Rory Sutherland’s rolling list of psychology experiments

Aizle tests

This is the section that made me fall in love with behavioural science in the first place. Not the theories → the experiments. Real humans, real choices, real proof that we are gloriously, predictably irrational. After years of teaching this stuff, I can tell you: students’ eyes light up when you show them an experiment. Theories put them to sleep. Experiments wake them up.

Good stuff here, and happy googling to find the originals. I’ll eventually get around to adding proper links for all 185, but honestly → it’s a daunting task and I’ll leave the copying and pasting to you for now. Consider it a behavioural science treasure hunt. The finding is half the fun.

Rory Sutherland’s most powerful arguments are backed by empirical evidence → psychology experiments and behavioural science studies that reveal the gap between how economists assume people behave and how they actually behave. This page lists every experiment and study he has cited across 200 YouTube videos → 185 in total → with the key finding he draws from each one and a link to the exact moment he mentions it.

185 entries, sorted by citation frequency

Antibiotic pill colour experiment (blue and white pills)

The blue-and-white pill experiment is a study demonstrating that patients prescribed an antibiotic course of eighteen white capsules followed by six blue ones → chemically identical throughout → complete the regimen at significantly higher rates than patients given twenty-four uniform white pills. Rory cites it repeatedly to show that psychological design, specifically visual chunking, can change health behaviour without altering the underlying medicine. The finding is a cornerstone of his argument that the framing and presentation of an intervention routinely matters more than its intrinsic properties.

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London Underground dot matrix display boards experiment

The installation of countdown clocks on London Underground platforms → showing minutes until the next train → produced the single greatest improvement in passenger satisfaction per pound spent on the network. Rory uses this repeatedly to argue that reducing uncertainty has more psychological value than reducing actual wait time, and that cheap informational interventions routinely outperform expensive engineering ones.

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Bee Waggle Dance / 20% Dilettante Bees

Research into honeybee foraging behaviour found that roughly 20% of bees ignore the waggle dance and explore new food sources at random rather than exploiting known ones. Rory cites this as evolution’s built-in solution to the explore-exploit dilemma, arguing it justifies dedicating a fixed share of any organisation’s R&D budget to seemingly irrational, non-consensus exploration.

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Capuchin monkey fairness experiment → by Frans de Waal and Sarah Brosnan

An experiment by primatologists Frans de Waal and Sarah Brosnan found that capuchin monkeys actively reject cucumber rewards when they witness neighbouring monkeys receiving grapes for the same task, reacting with apparent indignation. Rory uses this to argue that sensitivity to relative fairness is not a cultural or rational construct but an ancient evolved instinct shared across primates, with direct implications for compensation design and pricing.

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Dot-Matrix / LED Displays on London Underground

The introduction of real-time LED arrival displays on London Underground platforms → showing ‘next train in X minutes’ → delivered greater gains in passenger satisfaction than any contemporaneous improvement to actual train frequency or speed. Rory cites this as definitive evidence that perceived control over uncertainty matters more to human wellbeing than objective improvements to duration, and that information is a form of psychological infrastructure.

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Ed Sheeran peep show experiment (Australian podcasters / Sainsbury’s Oxford)

Australian comedians Hamish and Andy staged a booth outside a Sainsbury’s in Oxford where Ed Sheeran would perform privately for two dollars; despite the extraordinary value on offer, almost no one entered because the ‘peep show’ framing destroyed all trust in the transaction. Rory uses this to illustrate that establishing contextual credibility is a prerequisite for value exchange → without the right frame, even a genuine bargain goes untaken.

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Heathrow Pod field experiment

The ULTra personal rapid transit pods operating between Heathrow Terminal 5 and its business car park are a real-world trial of driverless, on-demand transit running on a dedicated guideway. Rory references the system as evidence that behavioural design → reducing wait time, eliminating crowding, and giving passengers individual control over departure → can transform the subjective experience of travel even at small scale and modest speed.

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Red Bull / INSEAD case study

An INSEAD business school case study documented how Red Bull built a dominant global energy drink brand by deliberately violating standard marketing logic: pricing high, keeping cans small, placing product in the wrong coolers, and engineering an unpleasant taste as a feature. Rory uses it as a canonical example of psycho-logic → the idea that counterintuitive signals create value precisely because they contradict rational expectation, functioning as costly and therefore credible cues of quality.

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3G spectrum auction framing failure

The UK government’s 2000 third-generation mobile spectrum auction raised £22 billion → far exceeding forecasts → but saddled winning operators with debt that constrained infrastructure investment for years afterwards. Rory cites it as a cautionary case of value extraction in one domain (public finances) simultaneously destroying value in another (network quality and consumer experience), illustrating how economically ‘efficient’ mechanisms can have deeply counterproductive systemic effects.

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Austrian economics / praxeology (von Mises)

Praxeology, developed by Austrian economist Ludwig von Mises, holds that human action follows a distinct internal logic grounded in subjective purpose rather than measurable cause-and-effect, and therefore cannot be fully analysed through empirical or statistical methods. Rory references it as a theoretical counterweight to the dominance of data-driven decision-making, arguing that much consumer behaviour operates on precisely the kind of non-linear, meaning-dependent logic that praxeology describes and that conventional economics ignores.

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Betty Crocker cake mix experiment

When the Betty Crocker company simplified its instant cake mix to require only water, sales fell; restoring the requirement to add a fresh egg restored them. Rory cites this as an early demonstration of what later became the IKEA effect → the principle that effort and personal contribution increase perceived ownership and value, meaning that removing friction can paradoxically reduce rather than increase product satisfaction.

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Branded vs. unbranded analgesics pain study

A double-blind study found that chemically identical painkillers produced measurably greater pain relief when branded than when presented as generic → not merely different self-reports but different neurological outcomes. Rory cites this as proof that meaning is a genuine causal mechanism: branding does not change how pain is described but how it is processed. The implication is that perceived value is not a distortion of real value but a constituent part of it.

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Call center conversion experiment → Ogilvy Change

An Ogilvy Change experiment at a call center tested adding a single line → “most people choose B, but you could also choose A or C” → before presenting options, which more than doubled conversion on its own. Combined with four other small script changes, total conversion rate doubled overall. Rory uses this to show that social proof and subtle choice framing, not persuasion or pressure, can unlock enormous commercial value at near-zero cost.

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Diamond Shreddies Canada experiment

Nestlé Canada relaunched Shreddies by rotating the square cereal 45 degrees and marketing it as “Diamond Shreddies,” a change that tripled consumer excitement despite the product being physically identical. Rory cites this as a clean demonstration that perceived value is causally real → the psychological upgrade produced genuine satisfaction, not mere delusion. It collapses the distinction between a “real” product improvement and a “merely psychological” one.

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Dot matrix display boards on London Underground

Installing dot matrix displays showing real-time train waiting times on the London Underground was described as the single best improvement in passenger satisfaction per pound spent on the network. Rory draws on this to illustrate that uncertainty, not duration, is the primary source of waiting anxiety → seven minutes of certain waiting is experienced as less aversive than four minutes of uncertain waiting. Reducing information asymmetry is often cheaper and more effective than reducing the actual wait.

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German Bahncard study / Deutsche Bahn subscription model

The German Bahncard is a Deutsche Bahn subscription offering half-price rail travel in exchange for an annual fee, and it was observed to dramatically increase travel frequency among subscribers beyond what pure price sensitivity would predict. Rory cites it as a natural experiment in how sunk-cost psychology and habit formation transform a one-time purchase into a behavioural commitment. Charging for access can paradoxically increase engagement by giving customers a psychological incentive to use the product.

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Hotel in Memphis / ice sculpture data

Analysis of guest feedback at a Memphis hotel revealed that satisfaction scores across all dimensions → including the quality of an irrelevant garden ice sculpture → correlated almost entirely with the check-in experience. Rory cites this as evidence of confirmation bias in sequential perception: first impressions establish a narrative frame through which all subsequent experiences are interpreted. Investing disproportionately in the opening moment of a customer journey can yield returns across the entire experience.

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Hotel Memphis check-in / ice sculpture study

A systematic analysis of hotel guest reviews found that perceptions of every aspect of a stay → including the quality of an ornamental garden ice sculpture → were overwhelmingly determined by the check-in experience. Rory uses this to illustrate how narrative formation and confirmation bias shape all downstream perception once an initial impression is set. The practical implication is that the opening moment of any service has outsized leverage over everything that follows.

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IKEA Effect experiment

The IKEA Effect, documented experimentally by Dan Ariely and colleagues, is the finding that people assign significantly higher value to objects they have partially assembled themselves than to physically identical pre-assembled items. Rory cites it to argue that effort and agency are not merely costs but value-generating experiences → participation creates psychological ownership and attachment. This challenges the assumption that customers always prefer minimum effort on their own part.

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IPA Advertising Effectiveness Awards 2025 → four family-owned winners

The finding that four out of five IPA Advertising Effectiveness Award winners (Yorkshire Tea, McCain, Specsavers, and one other, plus Guinness) were family-owned businesses → cited as empirical evidence that the financial control structure of PLCs is destroying their ability t…

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Korean red traffic light countdown experiment

South Korea trialled countdown timers on both red and green traffic lights, finding that the intervention reduced accidents at red lights but increased them at green lights. Rory cites this as a model of empirical discipline → specifically the importance of testing the logical opposite of your initial hypothesis, which revealed that the same intervention had contrary effects depending on context. It warns against assuming any behavioural nudge will generalise beyond the specific condition in which it was tested.

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Pizza delivery default experiment → Ogilvy Change

An Ogilvy Change experiment changed a pizza delivery company’s default from “as soon as possible” to a specific time slot approximately one hour later, finding no drop in orders while customer satisfaction rose by 50%. Rory cites this to show that managing expectations through concrete commitment outperforms raw speed → customers care less about actual wait time than about knowing exactly what to expect. The change also enabled operational efficiencies through batched deliveries.

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Sarah Brosnan and Frans de Waal Capuchin Monkey Fairness Experiment

A landmark 2003 behavioural biology study by Sarah Brosnan and Frans de Waal in which capuchin monkeys refused cucumber slices when they observed neighbouring monkeys receiving grapes for completing the same task. The experiment provided evolutionary evidence that inequity aversion and fairness norms are not uniquely human constructs but hardwired features of primate cognition. Rory cites it to challenge the orthodox economic assumption that rational self-interest governs preference, arguing that relative comparison is a deeper biological driver of decision-making than absolute utility.

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The Esther Duflo Lentils and Inoculation Experiment

An influential field experiment by economist Esther Duflo in rural India in which offering a small tangible incentive → one kilogram of lentils per inoculation → combined with organising vaccination as a shared social event for multiple families simultaneously, dramatically increased take-up rates. The finding demonstrated that access and information alone are insufficient levers for behaviour change. Rory uses it as proof that framing, social context, and micro-incentives can solve problems that purely rational interventions cannot, illustrating the logic of psycho-logic over policy logic.

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The Lidmar Hotel Stockholm Lift Music Experiment

A low-cost experiment at the Lydmar Hotel in Stockholm in which lift buttons were reprogrammed to let guests select the music genre playing on their corridor floor, at an estimated total cost of around £1,000. The installation generated press coverage and guest delight wildly disproportionate to its price tag. Rory cites it as a canonical example of how small acts of unexpected personalisation and agency create outsized brand differentiation → demonstrating that psychological ingenuity consistently outperforms expensive physical improvement.

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Waggle dance bees / explore-exploit trade-off research

A finding from honey-bee colony research revealing that roughly 20% of worker bees routinely ignore the waggle dance → the hive’s primary information-sharing signal → and instead explore new foraging locations at random. Without these non-conformist scouts, colonies optimise toward known sources and become trapped in a local maximum, unable to adapt when those sources fail. Rory deploys it as a definitive biological argument for why brand investment and creative exploration cannot be fully subordinated to performance optimisation without creating long-term systemic fragility.

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Walmart / GLP-1 Data

An internal data analysis in which Walmart cross-referenced pharmacy prescription records for GLP-1 drugs such as Ozempic with loyalty card purchase histories, finding that patients on the medication significantly reduced impulsive food and alcohol purchases. The data suggested that overconsumption behaviours typically attributed to weak willpower may have a neurological or metabolic basis amenable to pharmacological intervention. Rory cites it to argue that reframing problems biologically rather than morally can unlock solution spaces that nudges and behaviour change programmes alone cannot access.

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15-second vs 30-second TV ad study

A study referenced by Daniel Kahneman demonstrating that viewer recall of television advertisements was statistically equivalent for 15-second and 30-second versions, provided the peak emotional moment and the final frame were held constant across both formats. Duration alone contributed nothing measurable to memorability. Rory cites it as empirical support for the peak-end rule in advertising → the intensity of key emotional moments determines effectiveness, and media length is a poor and expensive proxy for impact.

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7-digit memory and chocolate cake

A dual-process psychology experiment in which participants asked to hold a seven-digit number in working memory were significantly more likely to choose chocolate cake over fruit salad when offered a snack en route to their destination. The study illustrated that deliberate self-control and conscious deliberation draw on the same finite cognitive resource as numerical memory. Rory uses it to argue that environments which impose cognitive load predictably erode rational decision-making → and that the apparently irrational choice is often simply the one made under constraint.

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A and B squares optical illusion

The Adelson checker shadow illusion, a visual demonstration in which two squares on a chessboard pattern → one in shadow, one in light → are physically identical in grey value yet are perceived as markedly different shades, an effect that persists even after the viewer is shown proof. Rory uses it as his foundational demonstration that all human perception is relative and context-dependent rather than absolute. The same principle, he argues, governs how consumers evaluate price, quality, and value → making context the primary product.

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Adam Grant’s Lifeguard Study

A field study by organisational psychologist Adam Grant in which newly trained lifeguards who heard first-person accounts of dramatic rescues early in their careers subsequently volunteered 43% more hours than a control group that received no such stories. The intervention required no structural change, no additional pay, and no new training. Rory cites it as evidence that narrative meaning and a felt sense of purpose are powerful and underutilised performance levers → and that organisations routinely neglect the motivational infrastructure that stories alone can provide.

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Affirmation bias hotel check-in study (Nashville)

A hotel experiment conducted in Nashville in which guests explicitly told at check-in that they had made an excellent choice of hotel reported significantly higher satisfaction scores than an identical control group who received no such affirmation → despite experiencing the identical stay. The product was unchanged; only the pre-experience framing differed. Rory uses it to illustrate that anticipated quality shapes perceived quality, and that post-purchase validation is a cheap, neglected mechanism for improving satisfaction without touching the physical product at all.

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Airline website premium economy experiment

A website redesign for an unnamed airline displayed economy and premium economy seats side by side rather than on separate pages, generating an estimated £10 million per year in additional premium revenue. Rory cites this to show that demand is not a fixed property of a product → it is extraordinarily sensitive to how choices are framed relative to one another. The same seat, presented in a different visual context, becomes either an extravagance or an obvious upgrade.

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Airport queue separation (parallel lanes / baggage trays)

A redesign of airport security infrastructure separated travellers into parallel lanes with personal baggage trays, ensuring that one person’s fumbling does not cascade into delays for everyone behind them. Rory describes this as behavioural design that successfully reduces passenger anxiety without ever asking people why they were anxious or requiring them to change their behaviour. It demonstrates that systemic friction, not individual psychology, is often the true source of stress → and that design can solve problems that rational persuasion cannot.

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Alex Batchelor / Royal Mail Research

Research associated with Alex Batchelor found that Royal Mail’s substantial investment in improving delivery reliability produced no measurable improvement in brand perception among customers. The finding was that customer opinion of Royal Mail was determined almost entirely by whether they liked their local postman → a personal, relational variable that bypassed all operational metrics. Rory uses this to argue that human relationships and emotional signals routinely trump rational service quality in shaping how brands are actually experienced.

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American Airlines unlimited lifetime first-class ticket disaster

In 1981, American Airlines CEO Bob Crandall sold ‘AAirpass’ unlimited lifetime first-class tickets for roughly $250,000 each to raise emergency operating capital. Buyers exploited the passes so aggressively → some flying to Chicago just for the day, others routinely booking friends onto transatlantic routes → that each ticket eventually cost the airline an estimated $1 million per year. Rory cites this as a spectacular demonstration that products can be economically rational in design yet catastrophically wrong in failing to model how real humans will actually behave.

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Analytic Partners data (media synergies)

Analytic Partners, a marketing analytics consultancy, has published research showing that deploying multiple media channels in combination produces returns that measurably exceed the sum of each channel evaluated in isolation. Rory cites this data to challenge single-channel attribution models, which he argues systematically undervalue brand and broadcast media by ignoring cross-channel amplification effects. The findings support his broader argument that reductive measurement destroys value that only emerges from the interaction between elements.

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Antibiotic prescription completion

Delayed prescribing is a clinical technique in which a doctor gives a patient an antibiotic prescription dated several days in the future, instructing them to fill it only if symptoms have not resolved by then. Studies have shown this approach reduces unnecessary antibiotic dispensing by around 65%, since many patients recover naturally and never collect the prescription. Rory cites this as evidence that a simple procedural nudge → adding temporal friction to the decision → can achieve what rational public health persuasion campaigns about antibiotic resistance have largely failed to do.

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Backhouse Jones 26p/day pricing

Backhouse Jones, a UK transport law firm, restructured how they communicated their fees by expressing costs as 26 pence per vehicle per day, and left 29-penny coins on delegates’ seats at industry conferences to make the figure viscerally tangible. This reframing transformed legal costs from an open-ended, anxiety-inducing hourly liability into something that felt trivially manageable → without changing the underlying price. Rory cites this as a textbook example of psycho-logic: identical economic value, presented through a different frame, produces a radically different emotional and commercial outcome.

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Barry Schwartz jam experiment

The jam study → most famously associated with Sheena Iyengar and popularised by Barry Schwartz → found that shoppers encountering a display of 6 jam varieties were significantly more likely to make a purchase than those confronted with 24 options. Rory acknowledges the result as an influential demonstration of choice overload while also noting its emergence as a symbol of the replication crisis, with subsequent studies producing inconsistent results. He argues the more interesting finding is not the headline effect but its contextual variability → the impact of choice is highly situational, which is precisely what a mature behavioural science should be able to explain.

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Bee waggle dance exploration research

Researchers studying honeybee foraging discovered that roughly 20% of bees consistently ignore the waggle dance → the colony’s signal directing foragers toward known food sources → and instead explore in random, unprogrammed directions. When the hive is modelled as a complex adaptive system, this minority of non-conforming bees turns out to prevent the colony from becoming trapped in a local optimum when better, undiscovered food sources exist. Rory cites this as evidence for the deep systemic value of the explore-exploit trade-off: a purely rational, signal-following system would be more efficient in the short run but catastrophically brittle over time.

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Bee waggle dance split behaviour → evolutionary biology

In honeybee colonies, a fixed proportion of worker bees are behaviourally programmed to ignore the waggle dance and forage independently, creating a natural split between exploiting known resources and exploring for unknown ones. This is not a communication failure but an evolved solution to the fundamental problem any system operating under uncertainty faces: whether to optimise what it already knows or search for something better. Rory draws on this from evolutionary biology to argue that what looks like irrational non-compliance at the individual level often reflects deep adaptive wisdom at the system level.

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Belgian biscuit / low-fat variant case

A real consulting case Rory ran at Ogilvy in which a client’s low-fat biscuit variant lost sales despite consumers being unable to distinguish it from the original in blind taste tests. The packaging → specifically the words ‘now with lower fat’ → signalled reduced indulgence before anyone took a bite, making the product seem less tasty. It became his founding illustration that labels change the experience of a product, not merely its description.

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Binet and Field (IPA Databank research)

Les Binet and Peter Field’s large-scale analysis of hundreds of advertising effectiveness case studies held in the IPA Databank, one of the most rigorous commercial datasets in marketing. Rory cites it as hard empirical evidence that long-horizon brand-building generates demonstrably stronger returns than purely rational, performance-driven messaging. The research challenges the industry’s drift toward short-term, measurable direct response at the expense of less legible but more powerful brand investment.

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Bonobos / currency and prostitution experiment

An experiment in which bonobos taught to use metal tokens as currency spontaneously began exchanging them for sex within days of learning the system. Rory deploys it as a mischievous but pointed illustration that economic exchange and sexual bargaining are not modern cultural constructs but deeply embedded evolutionary adaptations. The speed of emergence suggests the infrastructure for markets and social negotiation is wired far below conscious cognition.

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Bottleneck / Theory of Constraints traffic analogy

A thought experiment adapted from Goldratt’s Theory of Constraints: a road narrowing to two lanes causes a jam, but a badly-timed traffic light further downstream is the real culprit → widening the road merely relocates the problem. Rory uses it to argue that in any complex system, investment anywhere other than the true constraint is wasted effort. Identifying and fixing the bottleneck is always the first obligation before optimising anything else.

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Bouba-Kiki experiment

A cross-modal perception experiment originally devised by Wolfgang Köhler and later extended by Charles Spence, in which people across unrelated cultures reliably assign the nonsense word ‘Bouba’ to rounded shapes and ‘Kiki’ to jagged ones. Rory cites it as evidence that sensory associations are not arbitrary or culturally learned but deep, consistent, and pre-rational. It supports his broader argument that meaning is shaped by subconscious pattern-matching rather than conscious interpretation.

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British Airways winter sale choice reduction

An internal British Airways experiment that reduced the number of destinations featured in a winter sale promotion and found that conversion rates improved as a result. Rory uses it as direct commercial counterevidence to the received wisdom that more choice always increases customer satisfaction and sales. It illustrates that abundance can paralyse, while constraint → even artificial constraint → focuses attention and builds confidence in a decision.

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Broadband upgrade with one-penny charge

A field experiment in which customers who had repeatedly declined a free broadband upgrade accepted it in significant numbers once a nominal 1p charge was added, tripling conversion. Rory presents it as a clean demonstration that price functions as a quality signal, not merely a cost: free can read as worthless or suspicious, while even a trivial charge reframes an offer as something legitimate. The finding directly inverts standard economic logic, where removing a cost should always improve uptake.

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Call centre → “Most people choose B” social proof experiment

Adding a single sentence telling callers which option most people choose increased conversion rate 2.5-3x

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Captain’s age problem (French study)

A classroom study in which French schoolchildren, presented with the question ‘a ship carries 26 sheep and 10 goats → how old is the captain?’, proceeded to calculate an answer rather than identify the question as nonsensical. Rory uses it to illustrate that humans are anchoring machines: given a numerical context, we produce numerical outputs even when no valid inference is possible. It demonstrates how the format and framing of a question shapes its answer regardless of the question’s actual coherence.

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Car trade-in framing (€3,000 off vs. on → 20,000 extra cars)

European car manufacturer experiment showing that framing a €3,000 trade-in allowance as a reduction on a new car price (vs. off) sold 20,000 more cars → illustrates how economically identical offers can produce radically different purchase rates.

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Car valeting / McGurk effect on product perception

An observation that a freshly valeted car feels subjectively smoother, quieter, and faster even though nothing mechanical has changed → a sensory halo generated by visual cleanliness and smell. Rory connects this to the McGurk effect: perception is holistic and cross-modal, so altering one sensory input rewrites the experience of others entirely. The valeted car is his everyday illustration that quality is a gestalt rather than a sum of objective, independently measurable parts.

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Chattel house / trailer park disentanglement (Caribbean)

A historical practice in Caribbean plantation societies where tenant housing was constructed to be physically portable, allowing renters to relocate their home when landlords became exploitative. Rory cites it as an elegant systemic solution to power imbalance: rather than regulating landlord behaviour directly, the chattel house gave tenants credible exit, which disciplined the entire rental market without legislation. He invokes it as a model for housing policy → that building in mobility and optionality can solve problems that direct legal intervention consistently fails to address.

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Checker shadow illusion (Adelson’s squares)

An optical illusion created by MIT vision scientist Edward Adelson in which squares A and B on a checkerboard appear to be distinctly different shades of grey but are in fact identical in absolute luminance. Rory returns to it repeatedly to argue that human perception → of colour, price, and value alike → is always relative and contextual, never absolute. Just as the visual system constructs shade from surrounding contrast, consumers construct value from surrounding cues, meaning the same product can feel cheap or expensive depending entirely on context.

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Chilean food factory contamination experiment → Ogilvy Change

A behavioural redesign project conducted by Ogilvy Change in which food manufacturing processes were restructured to reduce contamination risk, rather than simply instructing workers to be more careful. Rory cites it to show that applying behavioural science to operational problems can yield genuinely novel, patentable solutions → in this case the client chose to protect the design rather than publish it. The lesson is that reframing a problem as psychological rather than technical opens solution spaces invisible to conventional process engineering.

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Coca-Cola dynamic pricing vending machine

A trial by Coca-Cola in which vending machines raised prices as stock levels fell, applying classic yield management logic to soft drink retail. The experiment was abandoned after the mechanism became public and triggered immediate consumer outrage. Rory uses it to show that economically rational pricing strategies are psychologically impossible for consumer brands, where the perception of fairness is a load-bearing part of the brand relationship.

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Coca-Cola yield management vending machine test

A test by Coca-Cola in which vending machine prices rose automatically as ambient temperature increased → a demand-sensing pricing model borrowed from airline revenue management. Consumer backlash forced the company to scrap the programme, and Sutherland cites it to argue that yield management is psychologically intolerable for commercial brands but may be acceptable for charities, where the framing shifts profit from corporate gain to public good.

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Coffee shop closing time / mop-out observation

An observation from retail fieldwork that coffee shop sales decline sharply in the hour before closing not because customers stop wanting coffee but because staff begin mopping floors, stacking chairs, and signalling unwillingness to serve. Rory uses it to illustrate how supply-side behaviour is routinely misread as demand data, and how operational decisions can manufacture the appearance of a natural market signal that is in fact entirely artificial.

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Colonoscopy peak-end rule study

A clinical study, referenced by Kahneman, in which the colonoscopy camera was held stationary at the end of the procedure rather than being immediately withdrawn, reducing the final sensation of discomfort. This small, costless change to the ending substantially improved patients’ recollection of the experience and their willingness to return for follow-up procedures. Rory cites it to show that the architecture of an experience’s ending is disproportionately powerful relative to the effort required to change it.

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Colonoscopy peak-end study

Kahneman’s foundational research showing that patients’ remembered pain from a colonoscopy is determined by peak intensity and how the procedure ended, not by its total duration → a finding that directly contradicts utilitarian assumptions about cumulative suffering. A longer procedure with a gentler ending was remembered more favourably than a shorter one that ended sharply. Rory uses this to argue that service designers should optimise for the remembered experience rather than the experienced one.

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Colonoscopy study

Kahneman’s finding that the duration of an unpleasant experience contributes surprisingly little to how it is later recalled, with peak discomfort and the final moment being the dominant factors. Rory applies this directly to advertising, noting that a 15-second spot is not automatically less effective than a 30-second one, since what matters is whether the ad creates an emotional peak and ends well, not how long it runs.

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Colour perception on screens (TV RGB hack)

The technical reality that television and computer screens cannot emit yellow light → yellow is perceived when red and green photoreceptors are stimulated simultaneously, and purple has no corresponding wavelength in the physical spectrum at all. Rory uses this to introduce the idea that perception is a species-specific model of reality rather than a direct readout of it, and that what feels objectively true about consumer experience is always a construction shaped by the architecture of the perceiving mind.

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Countdown clock / Red traffic lights experiment (Korea)

A study from South Korea in which countdown timers added to red traffic lights showed drivers how long they had to wait, reducing accident rates. When identical timers were applied to green lights, accident rates rose, as drivers began preparing to accelerate before the light changed. Rory cites it to argue that psychologically symmetrical interventions produce asymmetric outcomes, and that any behavioural design ignoring the psychological state it enters will fail → or actively backfire.

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Credit Suisse family business index

The Credit Suisse Family Business Index was a research index compiled by Credit Suisse tracking the stock performance of publicly listed companies with significant family ownership, finding they consistently outperformed broader market benchmarks. Rory cites this as evidence that patient, long-termist governance → natural to family businesses with reputational skin in the game → generates superior returns that conventional shareholder-value logic discounts. Trust, loyalty, and long time horizons are not soft virtues but hard competitive advantages.

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CROCS / school attendance intervention (UNICEF)

A UNICEF school attendance programme distributed Crocs shoes to schools rather than directly to unshod children, creating a visible social link between attending school and receiving the footwear. Rory cites this as a masterclass in social proof and incentive architecture: the delivery mechanism → not the gift itself → drove behaviour change by making desirable footwear a publicly observable reward for attendance. Peers who wanted the shoes had to show up to get them.

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Cucumber and cat experiment

The cucumber-and-cat phenomenon, widely documented online, shows that silently placing a cucumber behind a cat causes it to leap away in alarm upon turning around, apparently triggering a hardwired threat response. Rory uses this to illustrate the evolutionary logic of variance reduction: cats whose ancestors over-reacted to ambiguous dangers survived longer than those who paused to investigate. It supports his argument that apparently irrational fear responses → in animals and consumers alike → are adaptive strategies encoded by natural selection.

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Dallas Fort Worth queue psychology experiment

A behavioural proposal by consultant Courtney Moore suggested making gate information at Dallas Fort Worth Airport intentionally ambiguous until shortly before boarding, preventing passengers from committing to a premature queue. Rory cites this as an elegant example of solving a costly friction problem through information design alone: a passenger who cannot identify which gate will open has no queue to join and is free to use the terminal productively. Certainty causes the crowding, not the passengers.

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Dallas/Fort Worth Airport Gate Ambiguity Experiment

Behavioural scientist Courtney Moore proposed at Dallas Fort Worth Airport that gate assignments be kept vague → announced as “gate 47 or 48” → until departure was imminent, eliminating the premature crowding that forms when passengers lock onto a single gate. Rory uses this to demonstrate that psycho-logical solutions can outperform expensive physical redesigns at near-zero cost. Deliberately introduced uncertainty improved passenger flow and terminal experience without altering a single piece of airport infrastructure.

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Dan Ariely employee satisfaction investment fund

An investment fund strategy associated with Dan Ariely uses employee satisfaction scores as the primary criterion for stock selection, with approximately five years of data suggesting the metric is a reliable predictor of financial returns. Rory cites this → frequently pointing to Costco as a standout example → to argue that soft variables like morale and trust are leading indicators of business quality that conventional financial analysis ignores. What looks like corporate altruism is actually an information signal the market systematically misprices.

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Darwin’s Marine Iguana Experiment

During his Galapagos voyage, Charles Darwin observed that marine iguanas, when repeatedly thrown into the sea, would consistently scramble back to land despite water being their primary feeding ground, because terrestrial predators were historically absent from the ocean. Rory uses this to illustrate how evolved behavioural defaults persist long after the original threat disappears. It is an analogy for consumer behaviour and loss aversion: habits that appear irrational are often just calibrated to a world that no longer exists.

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Delayed prescription antibiotics study

A clinical study gave patients with mild infections a prescription with instructions to fill it only if symptoms had not improved after a few days, rather than prescribing antibiotics immediately or withholding them entirely. Rory cites this as a model of low-cost behavioural design that reduces unnecessary antibiotic consumption without worsening health outcomes or patient satisfaction. Giving people the option to act → a fallback they may never invoke → satisfies the psychological need for reassurance while keeping actual behaviour in check.

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Delayed prescription experiment

General practitioners in a delayed prescription trial issued conditional or post-dated prescriptions to patients with mild infections, redeemable only if symptoms failed to resolve on their own → reducing antibiotic dispensing by roughly 65 percent with no deterioration in health outcomes. Rory uses this to argue that changing decision architecture is often more effective than confronting behaviour directly. It also illustrates the power of optionality: the existence of a safety net changes what people choose to do, even when they never invoke it.

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Dentist appointment card → patient fills in their own date

Dentists who hand patients a blank card and pen to write their own appointment date have far higher show rates than those who pre-fill the card

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Diamond Shreddies experiment → Shreddies/Post Foods Canada

Diamond Shreddies was a 2007 Canadian marketing campaign by Post Foods in which the square cereal was rotated 45 degrees, repackaged as a distinct premium product, and sold alongside the original → with focus group participants genuinely claiming the diamond version tasted better. Rory uses this as his signature example of psycho-logic: a zero-cost perceptual reframe that altered experienced quality without changing the physical product at all. It demonstrates that value is not intrinsic to objects but constructed by context, expectation, and framing.

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Disney queue psychology

Disney’s queue management system uses themed environments, entertainment, and wait-time information boards to reduce the psychological burden of waiting without reducing actual wait times. Rory cites it as evidence that the subjective experience of a process → not its objective duration → drives satisfaction. Providing accurate wait-time information relieves anxiety more than shortening the queue itself, because uncertainty is what makes waiting intolerable.

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Dog/electric floor experiment

The learned helplessness experiment, which Sutherland attributes to Daniel Pink, exposed two dogs to electric shocks → one could press a button to stop them, the other could not. The dog with the button remained relatively stable; the one without control fell into depression and eventually stopped trying to escape even when escape became possible. Rory draws the lesson that perceived control over one’s environment matters more to psychological wellbeing than the actual conditions endured.

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Donald MacKinnon creativity research (Berkeley, 1950s)

MacKinnon’s Berkeley research in the 1950s compared highly creative architects to their less creative peers, finding that the creative group characteristically delayed beginning work → tolerating ambiguity rather than committing immediately to a solution. Rory cites the study, via John Cleese, to argue that premature problem-solving is the enemy of genuine creativity. The willingness to sit with uncertainty, rather than defaulting to the first obvious answer, is what separates truly inventive thinking from competent execution.

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Dot matrix displays on London Underground platforms

Countdown information boards installed on London Underground platforms → showing passengers the minutes until the next train → produced the largest single improvement in passenger satisfaction per pound spent across the entire network. No extra trains were added; only information was changed. Rory treats this as definitive evidence that perceived wait time matters more than actual wait time, and that psychological interventions can outperform engineering solutions at a fraction of the cost.

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Dr. David Metz’s Transport Research

David Metz’s decades of transport research established that humans maintain a roughly constant daily travel time budget of around 60–70 minutes regardless of transport speed → faster modes are used to travel further, not to arrive sooner. Rory cites this to dismantle the standard economic case for infrastructure investment, which assumes speed improvements generate calculable time savings. If people simply spend the saved time travelling more, the supposed benefit is a change in geography, not a gift of time.

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Drone defibrillator delivery experiment (Sweden)

A Swedish study tested drone delivery of defibrillators to out-of-hospital cardiac arrest locations, finding drones could reach patients significantly faster than ambulances in many cases. Rory uses it to argue for a low-altitude economy in which commercial drone infrastructure → funded by deliveries of coffee or parcels → generates a healthcare benefit as a byproduct. The insight is that commercial and social cases for infrastructure can be bundled together, solving the funding problem that otherwise blocks life-saving investment.

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EasyJet pilot bus announcement experiment

When an EasyJet flight arrived at a remote stand requiring a bus transfer, a pilot used the PA to explain that the bus would take passengers directly to passport control, bypassing the normal terminal walk. Passengers who had been audibly disappointed instantly shifted to appreciation. Rory cites this as proof that reframing objective reality costs nothing but transforms emotional response entirely → the same situation, differently described, produces a completely different experience.

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Ed Sheeran peep show stunt (Melbourne comedians)

Melbourne comedians placed Ed Sheeran → one of the world’s best-selling recording artists → in a peep show booth charging $2 for entry, with minimal signage; almost nobody stopped. Rory cites the stunt to illustrate how thoroughly context and framing determine perceived value: stripped of the signals that normally indicate desirability → stadium, crowd, media → the same performer becomes invisible. Value is not intrinsic to a product; it is constructed by the surrounding signals.

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Electric car return rate study

Studies tracking electric vehicle buyers found that only around 7–8% subsequently return to petrol cars. Rory cites this to argue that many choices which feel risky before the fact turn out to be nearly irreversible in a positive direction once experienced. The anxiety surrounding the decision vastly exceeds the regret that follows → a pattern he attributes to loss aversion and the tendency to overweight unfamiliar negatives before having any direct experience of the alternative.

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Elevator mirror experiment

Building managers responding to complaints about slow elevators installed mirrors in lobbies and cabs; complaints fell sharply despite no change in elevator speed. Rory treats this as a foundational illustration of his core argument: that the felt experience of a process → not its objective performance → is what drives satisfaction. Improving perception is typically cheaper and faster than improving the underlying system, yet conventional thinking defaults to the engineering solution every time.

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Elevator mirror intervention

The elevator mirror intervention is a behavioural design case in which mirrors were installed in the lobbies of a New York hotel to reduce complaints about slow lifts. Complaint rates fell dramatically without any engineering change to lift speed itself. Rory cites this repeatedly to argue that psychology can solve problems more cheaply than technology, and that identifying the real problem → boredom, not wait time → is more valuable than optimising the stated one.

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Ergodicity Coin-Toss Experiment (Ole Peters)

The ergodicity coin-toss experiment, developed by physicist Ole Peters, models a bet yielding +50% on heads and −40% on tails. While the ensemble average across many simultaneous players is positive, the time-average for any single player repeating the bet is negative → they will eventually go broke. Rory uses this to show that risk-pooling inside organisations is not altruism but rational strategy: what destroys the individual is perfectly survivable when outcomes are shared across a group.

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Eyes over an honesty jar experiment

The honesty jar eyes experiment placed printed images of watching eyes above a communal coffee payment jar and found payment rates rose significantly compared to a control condition. Rory uses it to demonstrate that humans respond to social observation cues even when the observer is manifestly non-real, connecting the finding to the evolutionary function of religious iconography, totem poles, and other behavioural infrastructure that exploits the same perceptual mechanism.

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Facial recognition software and pareidolia

Facial recognition software exhibits false positives → detecting faces in images where none exist → mirroring the human cognitive tendency known as pareidolia. To be reliably accurate at spotting real faces, any detection system must be calibrated to over-detect rather than under-detect. Rory uses this to argue that what appears to be an irrational bias in human cognition is a rational feature of any system operating under asymmetric error costs, where a missed face is more dangerous than a false alarm.

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Fake gin and tonics experiment

The fake gin and tonics experiment gave regular drinkers two genuine gin and tonics before switching to tonic water served in glasses whose rims had been briefly dipped in gin. Subjects not only failed to detect the substitution but began exhibiting genuine signs of intoxication after only two real drinks. Rory cites this to illustrate that the brain is not a faithful sensory recorder but a prediction machine that takes cheap shortcuts → detecting the smell of gin is sufficient to trigger the physiological response expected to follow.

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Familial DNA / Golden State Killer identification

The identification of the Golden State Killer in 2018 used familial DNA matching against consumer ancestry databases to connect decades-old crime scene evidence to a suspect who had long evaded capture. Rory uses this case to illustrate how technology routinely produces consequences its designers never anticipated → a genealogy product became a forensic tool → and how a single new data point can retroactively transform the entire biographical meaning of a person who believed their past was settled.

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Find my flights” button test

The find my flights button test found that replacing the label “Find flights” with “Find my flights” on a booking interface produced a measurable uplift in conversion rates. Rory cites this as evidence that small linguistic changes can shift behaviour significantly by invoking psychological ownership → the possessive pronoun narrows the distance between user and outcome, making commitment feel more natural and personal without altering anything substantive about the product.

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Ford-Edison electric car (early 20th century)

The Ford-Edison electric car was a technically viable electric vehicle developed in the early twentieth century that failed commercially despite its engineering credentials. Rory references it → often via Jay Leno’s Garage → to argue that technologies are rarely killed by pure technical inferiority: the electric car became culturally coded as a vehicle for women while petrol cars accumulated masculine status through racing and farm use, and this imagery gap proved fatal, directly foreshadowing the user-perception challenges confronting modern EVs.

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Gambetta and Hertog study → engineering and terrorism

Sociology study finding that a disproportionate number of Islamic terrorists have engineering backgrounds → cited as a counterintuitive finding that challenges assumptions about who becomes radicalised, and as an example of empirical sociology producing genuinely surprising re…

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Gin and tonic rim experiment

The gin and tonic rim experiment gave regular drinkers two real gin and tonics, then served plain tonic water in glasses whose rims had been dipped briefly in gin. Subjects continued acting increasingly intoxicated despite consuming no further alcohol. Rory uses this as evidence that perception operates as an economising shortcut system → the brain uses cheap proxy signals rather than full sensory processing to construct experienced reality, meaning that context and framing can generate physiological effects that logic would predict impossible.

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Google Research on Degree Class and Job Performance

Internal research at Google found no meaningful correlation between an employee’s university degree classification and their subsequent performance in the role. Rory uses this finding to challenge the logic of credentialism in recruitment → degree grades are a costly, slow filter that measures a narrow band of exam-passing ability rather than the diverse qualities that predict real-world performance, suggesting that conventional hiring practices systematically optimise for the wrong proxies while excluding candidates who would actually excel.

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GP appointment confirmation text experiment

An NHS behavioural intervention in which appointment reminder texts were reworded from a statement to a question → ‘Can we expect you at 9am? Reply Y’ → producing a significant reduction in no-shows. The change works by requiring patients to make an active commitment rather than passively receiving information. Rory uses it to illustrate that the psychological framing of a message can have more impact than its informational content.

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Group vs. individual hiring diversity experiment → Rory’s observation

An observation that the unit of hiring → one candidate at a time versus a group simultaneously → systematically changes diversity outcomes. When filling a single role, selectors unconsciously optimise for conformity with existing team members; when filling several at once, they instinctively seek complementarity. Rory uses this to argue that batch hiring could reduce gender and ethnic bias structurally, without requiring explicit diversity mandates.

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Group vs. individual hiring experiment (diversity)

The finding that selecting candidates in cohorts rather than individually produces a more diverse workforce as an automatic byproduct of the process. When choosing a group, selectors naturally allow greater variance across candidates; when choosing one person sequentially, they compress variance toward a single type. Rory cites this as evidence that structural changes to hiring processes can achieve diversity outcomes that explicit bias training consistently fails to produce.

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Hand-written letters to homeowners (triplet family)

A real-world case in which a family expecting triplets sent handwritten letters to 25 homeowners whose properties were not listed for sale, explaining their situation and desire to buy. Roughly eight responded, five invited the family to visit, and four ultimately made offers → an extraordinary conversion rate from a cold approach. Rory uses it to illustrate costly signalling: the effort and personalisation of the letters conveyed genuine intent in a way no standard estate-agent process could replicate.

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Harrods Sale pricing experiment (proposed)

A thought experiment proposed by Sutherland: secretly reduce Harrods prices by a third year-round and observe whether sales volumes increase proportionally. His prediction is that they would not, because the Harrods sale derives much of its power from social proof, scarcity, and event psychology rather than from the price reduction itself. The experiment is designed to isolate how much of the sale’s commercial lift comes from framing rather than actual value change.

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Hillary Clinton 2016 campaign

The 2016 US presidential campaign in which data analyst Robbie Mook used quantitative modelling to override Bill Clinton’s instinct to campaign in Wisconsin, redirecting resources to Arizona instead. Clinton lost both states. Rory uses it as evidence that big data, by optimising within known patterns, systematically suppresses the kind of counter-intuitive, instinct-driven decisions that can outperform statistical logic → and that overconfidence in models carries its own category of risk.

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HIV testing name experiment → New Orleans, 1980s/90s

A behavioural observation from HIV testing clinics in New Orleans in the 1980s and 1990s, in which patients routinely refused to give their name before being tested but were willing to provide it afterwards. The information requested was identical; only the sequence differed. Rory uses it to illustrate path dependence: the order in which a request is made can determine compliance entirely, independent of the content of the request itself.

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Honesty jar with eyes

A behavioural experiment in which photographs of eyes were placed above an honesty-system jar where office workers paid for their own coffee, with no person present to enforce payment. Contributions increased substantially when the eyes were displayed. Rory cites it as evidence that humans are governed by evolved social monitoring instincts → even a two-dimensional cue of being observed is sufficient to activate the same mechanisms as genuine social oversight.

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Identical twins reared apart

A body of research on identical twins separated in infancy and reunited decades later, cited by Daniel Kahneman and others, which finds striking similarities in mood, personality, and subjective wellbeing despite entirely different life circumstances. The evidence suggests that baseline happiness is substantially heritable rather than determined by environment or achievement. Rory draws on this to challenge the assumption that improving objective conditions → income, status, health → will reliably translate into improved wellbeing.

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Illegal pricing experiment (unnamed multinational)

An accidental experiment reported to Sutherland by an unnamed multinational, which had on several occasions added ‘50% extra free’ packaging to a product while simultaneously raising the underlying price by 50%, leaving actual consumer value unchanged. The company found it generated significantly higher revenue than the original price. Rory uses this as evidence that perceived deal psychology → the narrative of getting more → drives purchasing decisions far more reliably than the arithmetic of actual value.

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Italy penalty points (loss aversion) → reverse points system

Italian road safety system gives you 12 points and takes them away rather than adding points; found loss aversion makes this more effective at changing behaviour

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Japanese trolley in supermarkets

A Japanese supermarket introduced a medium-sized trolley positioned between the hand basket and the large family trolley, producing a measurable increase in average customer spend. Rory cites this as evidence of the compromise effect: consumers reliably gravitate toward middle options not through rational calculation but because “medium” functions as a psychologically safe default. The implication is that adding a new contextual anchor can reshape purchasing behaviour without touching prices, products, or persuasion.

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John Lewis Tunbridge Wells observation

The John Lewis store in Tunbridge Wells was a commercial underperformer that Sutherland subjected to a Darwinian bottom-up diagnosis rather than conventional strategic analysis. He identified a cascade of small structural failures: poor car park access, signage that appeared only after the turn had been missed, a narrow street frontage with low visual impact, and an “At Home” sub-brand that confused rather than attracted shoppers. The case illustrates his argument that business outcomes are often decided by an accumulation of small environmental friction points invisible to top-down thinking.

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Kahneman GE Boardroom Risk Experiment

Daniel Kahneman presented eight GE division heads with a bet offering a 50% chance of gaining 50% and a 40% chance of losing 30% → a wager with clearly positive expected value. Almost every executive refused individually, even though collective acceptance across all eight would have been rational for the firm as a whole. Rory cites this to demonstrate how loss aversion combined with individual accountability makes organisations systematically over-cautious, blocking collectively rational behaviour even when the numbers unambiguously support action.

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Kahneman income/happiness study (with Deaton)

A study by Daniel Kahneman and economist Angus Deaton found that day-to-day emotional well-being plateaus at around $75,000 annual household income in the United States, while reported life satisfaction continues to rise beyond that threshold. Rory draws on this distinction to challenge the conflation of wealth with happiness, arguing that beyond a certain point, additional income buys narrative satisfaction and social comparison more than actual positive affect. The finding anchors his broader case that optimising for measurable proxies frequently misses what actually improves experienced lives.

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Kahneman’s curriculum development planning failure

While developing a rational decision-making curriculum in Israel, Daniel Kahneman’s expert team estimated the project would take one to two and a half years to complete. A colleague with relevant base-rate knowledge reported that roughly 40% of comparable projects were never finished and the rest took seven to ten years → yet the group voted to continue on their optimistic timeline regardless. The project took eight years and was never adopted. Rory cites this as a definitive illustration of planning fallacy: inside-view optimism persists even in experts explicitly trained to overcome it.

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Kahneman’s GE Boardroom Experiment

Kahneman demonstrated loss aversion to a General Electric boardroom by framing a series of investment opportunities as coin-flip bets, then progressively raising the stakes until potential losses felt tangible rather than abstract. Executives who readily accepted the bets at low stakes refused equivalent-odds wagers once the sums became meaningful. Rory uses this to show that loss aversion is not a theoretical quirk but a visceral psychological force that reliably distorts corporate decision-making precisely when the decisions matter most.

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Keeping seven digits in memory / chocolate cake vs fruit salad

In an experiment associated with Kahneman’s work on cognitive resources, participants asked to hold seven digits in memory were significantly more likely to choose chocolate cake over fruit salad than those memorising only two digits. The finding demonstrates that self-control and working memory draw on the same finite cognitive resource → when the brain is taxed, the rational system loses authority to the emotional one. Rory uses this to argue that context and cognitive state govern behaviour far more reliably than stated preferences or conscious intention.

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Kelly the dolphin / rubbish retrieval experiment

Kelly was a dolphin at the Institute for Marine Mammal Studies trained to retrieve litter from her pool in exchange for fish rewards. She learned to conceal large pieces of rubbish beneath a rock and present them one fragment at a time, generating multiple rewards from a single item. Rory invokes Kelly as a metaphor for digital marketing’s drift toward incremental metric optimisation → endlessly gaming the reward signal rather than addressing the underlying problem.

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KFC price increase experiment

A Kentucky Fried Chicken pricing trial found that raising prices on certain menu items increased rather than decreased sales. Rory cites this as direct evidence of price’s signalling function: in the absence of independent quality cues, consumers use cost as a proxy for value, making a higher price more attractive rather than less. The case directly contradicts the standard economic assumption that demand curves slope only downward and illustrates how psychology routinely inverts rational prediction.

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Lager price Goldilocks experiment

A lager pricing experiment offered consumers either two beers → cheap and premium → or three, with a mid-priced option introduced between them. The addition of the middle option significantly increased the proportion choosing the premium beer, which had previously been the less popular choice in the two-option condition. Rory uses this to demonstrate that preferences are not fixed but constructed in context: the same product becomes more appealing when a visible cheaper alternative reframes it as a reasonable quality choice rather than the expensive extreme.

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Learned Helplessness Experiment / Two Dogs and Electric Floor → attributed to Daniel Pink citing Seligman-related research

Learned helplessness research, popularized by Daniel Pink drawing on Seligman-related work, involves two dogs exposed to identical electric shocks → one has a lever to stop the shock, the other does not. The dog without control eventually stops trying and lapses into depression. Rory uses it to argue that perceived agency matters more to wellbeing than the objective level of suffering → the same stimulus produces radically different psychological outcomes depending on whether you believe you can influence it.

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Lemon-strawberry experiment (Charles Spence)

A perceptual psychology experiment by Charles Spence in which a lemon-shaped object is flavored with strawberry essence. Subjects do not experience cognitive dissonance → they do not report ‘this looks like a lemon but tastes like strawberry’ → instead they describe an entirely new, hybrid flavor. Rory cites it to show that expectation and context do not merely frame perception but actively construct it, making the case that psychological framing is inseparable from sensory reality.

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Low-fat biscuit taste study

A commercial case in which a biscuit manufacturer reduced fat content by 20 percent with no detectable difference in blind taste tests, yet saw sales fall 25 percent after adding a lower-fat label to the packaging. The health claim triggered the expectation of inferior taste, overriding what consumers had actually experienced. Rory uses it to demonstrate that marketing signals can damage a product’s perceived quality even when nothing about the product itself has changed.

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Lucy Letby case (statistical analysis context)

The Lucy Letby case was a UK criminal prosecution in which a neonatal nurse was convicted of murdering multiple babies → a case that generated significant debate about the use of statistical evidence in criminal trials. Rory invokes it to illustrate Kahneman’s WYSIATI principle: the jury was not shown potentially exculpatory statistical data, meaning a verdict was reached on a necessarily incomplete picture. It becomes an example of how the selective framing of available evidence shapes conclusions independently of underlying facts.

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Luxie Shen’s Variable Rewards Study (University of Chicago, 2014)

A 2014 University of Chicago study by Luxi Shen examining how reward uncertainty affects motivation found that 70 percent of participants completed a task when offered a 50/50 chance of winning either $1 or $2, compared to only 43 percent when offered a guaranteed $2. Rory cites it to argue that unpredictability in rewards is intrinsically motivating → the uncertainty itself generates engagement beyond what the expected monetary value of the outcome would predict.

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M20/M25 road sign confusion case → Rory’s own observation

The M20–M25 road sign confusion case originated when Sutherland, having repeatedly missed the junction, used Google Street View to investigate why and submitted his findings to the Highways Agency. His analysis showed the sign placement created near-certain navigational errors regardless of driver attentiveness → a structural design failure, not a behavioral one. He uses it to argue that what appears to be human error is frequently a design problem, and that tools available to ordinary citizens are sufficient to diagnose and report systemic infrastructure failures.

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Mary Wortley Montague / Variolation

Lady Mary Wortley Montague was an 18th-century British aristocrat who observed smallpox variolation practiced in Ottoman Turkey and introduced the technique to Britain in 1721 → decades before Jenner’s formal vaccination. Rory cites her as a historical example of empirical observation and lateral knowledge transfer driving major health innovation outside formal scientific channels, arguing that her method of noticing and copying a working solution exemplifies the kind of practical discovery that rationalist, top-down research frequently misses.

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McDonald’s Touchscreen Ordering Data

McDonald’s touchscreen ordering data revealed that significantly more men order meals containing two burgers compared to counter-based ordering → a discrepancy that had gone unnoticed because traditional face-to-face ordering was suppressing the behavior. Rory uses it to demonstrate that social embarrassment was masking genuine latent demand: men were unwilling to order two burgers from a human cashier. Removing that friction revealed what people actually wanted, illustrating that the context of a choice shapes behavior independently of underlying preference.

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McGurk Effect demonstration

The McGurk Effect is a perceptual phenomenon first documented by Harry McGurk and John MacDonald in 1976, in which mismatched audio and visual speech cues → hearing ‘ba’ while watching lips form ‘fa’ → produce a blended third perception, typically ‘fa’ or ‘va.’ Sutherland cites it to show that the senses do not operate as independent, cleanly separable data channels → perception is actively constructed from multiple inputs simultaneously → challenging the rationalist assumption that sensory information is processed objectively.

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Menu description experiments

Research including work associated with Brian Wansink and Charles Spence demonstrates that descriptive language → words like ‘succulent,’ ‘Pembrokeshire,’ or ‘Jersey’ on a menu → significantly increases willingness to pay and reported satisfaction with identical food. Rory cites these studies alongside findings on pricing format → eliminating currency symbols, spelling out prices in words → to argue that the same product commands genuinely different valuations depending on how it is framed. This supports his broader claim that psychological context is a legitimate and underutilized mechanism of value creation.

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Mona Lisa theft and winner-takes-all tourism

The Mona Lisa’s status as “the world’s greatest painting” was largely manufactured by journalists seeking a dramatic story around its 1911 theft; before the heist it was not the Louvre’s most celebrated work. The designation stuck after recovery, and today ninety percent of Louvre visitors queue to see a surprisingly small canvas. Rory uses this as a case study in winner-takes-all attention markets, where arbitrary events permanently concentrate cultural status on a single object regardless of intrinsic merit.

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Museum romantic vs. horror film experiment → by Chris Chabris, referenced as “Chris Covickius”

An experiment attributed to Chris Chabris found that the most effective museum marketing message depended entirely on the audience’s emotional state: after a romantic film, a distinctive “unique experience” message outperformed; after a horror film, social proof → “5,000 people visit daily” → worked best. Rory draws on this to argue that the brain is multimodular and context-sensitive, and that no single message is universally optimal → persuasion must account for the receiver’s psychological state at the moment of exposure.

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Nespresso Virtuo / Virtuo Plus Pricing Error

When Nespresso accidentally priced the Virtuo and Virtuo Plus machines identically, store staff reported customers would not purchase either model. The error illustrates that price functions not just as a cost signal but as a narrative device communicating relative value. When the pricing story becomes incoherent → offering no clear reason to choose one tier over another → decision-making stalls entirely, even when both options would otherwise represent good value.

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New York subway litter bins removal experiment

Removing rubbish bins from New York subway stations paradoxically reduced litter rather than increasing it. Overflowing bins had been broadcasting an implicit social norm that dropping rubbish was acceptable; their removal reset the environmental cue. Rory cites this to argue that behaviour is shaped more by contextual signalling than by the presence or absence of rational infrastructure → the intervention that looks like deprivation can outperform the one that looks like provision.

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No accidental deaths from consumer drones

Despite the worldwide proliferation of consumer drones, Sutherland found no documented cases of accidental civilian deaths from the technology. He contrasts this with the carnage of early motoring, where fatalities were frequent and expected, to challenge the assumption that new physical technologies are inherently dangerous. The observation is used to question whether regulatory anxiety about drones reflects genuine risk assessment or simply the psychological salience of an unfamiliar object.

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Nokia anthropologist vs. management consultant study

A Nokia anthropologist conducting field research with roughly 150 participants in developing markets found that consumers would pay twice the assumed ceiling for smartphones → directly contradicting Nokia’s large-scale quantitative research. Nokia dismissed the qualitative study in favour of its bigger dataset and delayed its smartphone launch by three years. Rory uses the episode to argue that small, richly contextual data can outperform large but poorly framed quantitative studies, and that organisations systematically undervalue qualitative insight.

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Nokia smartphone demand study

Nokia’s internal market research, based on half a million data points on feature-phone pricing behaviour, concluded there was no demand for expensive smartphones in developing markets. A concurrent anthropological field study of around 150 consumers proved the opposite, and Nokia’s decision to trust the larger dataset contributed to a three-year delay in its smartphone launch. Rory cites the case as evidence that sample size is not a proxy for insight → quantitative scale can generate false confidence when the underlying question is poorly framed.

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Nurofen / Australian Competition Commission ruling

The Australian Competition and Consumer Commission ruled against Nurofen for marketing identical ibuprofen formulations under targeted labels → “back pain,” “period pain” → at premium prices. Rather than treating this purely as deception, Sutherland argues the case illustrates that framing is not merely decorative: targeted labelling genuinely changes a product’s psychological efficacy for the consumer. The ruling, he suggests, may have inadvertently destroyed real value by treating a perceptual effect as if it were a physical fraud.

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Ogilvy Canada + Shreddies / Diamond Shreddies

Diamond Shreddies was a 2008 Ogilvy Canada campaign in which copywriter Hunter Somerville simply rotated the square Shreddies cereal 45 degrees and relaunched it as a new premium product. Consumer research, shown in the campaign’s widely circulated video, demonstrated genuine preference for the “diamond” shape despite the product being physically unchanged. Rory cites it as proof that perception is not a distortion of reality but a constituent part of it → reframing an object authentically changes the experience of consuming it.

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One-penny broadband upgrade experiment

In a broadband upgrade trial, customers who had refused a free upgrade accepted it at nearly triple the rate when charged a single penny. Free and cheap carry entirely different psychological signals: free implies a hidden cost or catch, while even a nominal charge confers legitimacy. Rory uses the result to argue that economic orthodoxy → lower price always increases uptake → can be empirically wrong, and that counterintuitive pricing interventions deserve serious testing before being dismissed.

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Overland Park tube map rebranding (London Overground)

The rebranding of London Overground → adding the suburban rail network to the standard Tube map with a distinct colour → increased ridership fourfold on the first day of publication, with almost no physical infrastructure change. Rory cites it as proof that a perceptual shift can generate value rivalling billions in capital investment, yet marketing is rarely credited for such outcomes. It is his defining example that improving psychological reality can be more powerful than improving physical reality.

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Pacometer Study (A.L. Peer et al.)

The Pacometer study by A.L. Peer and colleagues replaced a standard speedometer with one displaying minutes-per-distance, making immediately legible the fact that time saved by driving faster diminishes logarithmically as speed increases. Rory deploys this in arguments against HS2 and in speed-awareness contexts, showing that a simple reframing of the same underlying data can correct a systematic intuitive error → and that how information is presented can change behaviour as effectively as regulation.

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Penalty shoot-out analysis

Statistical analysis of professional football penalty shoot-outs shows that kicking down the centre succeeds at a higher rate than going left or right, yet players consistently under-use this option. Rory uses this to illustrate how reputational risk warps rational choice: being saved by a keeper who stays central looks foolish in a way that being saved going to a corner does not, so players accept a worse expected outcome in order to minimise social humiliation.

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Penny Post experiment (Rowland Hill)

The Uniform Penny Post, introduced by Rowland Hill in 1840, replaced a complex distance-based pricing structure with a single flat rate of one penny per letter regardless of destination, dramatically increasing both mail volume and revenue. Rory cites it as a historical proof-of-concept that radically simplifying and reducing the price of access can unlock suppressed demand. It supports his argument that friction and complexity often destroy more value than the economists who designed them ever intended.

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Pension top-up awareness experiment → Rory, two banking audiences

In informal experiments at banking conferences, Sutherland asked approximately 700 financial professionals on the spot whether they knew how to top up their workplace pension → virtually none did, despite pensions being a core employment benefit. He uses this to argue that design friction functions as an implicit normative signal: when a behaviour is obscure or difficult to locate, people infer it is not meant to be done. Removing the barrier is functionally equivalent to granting permission.

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Phone Call Center “Most People Choose Peak” Experiment

In a call-centre subscription trial, adding the single phrase ‘most people choose peak’ to the middle tier of a three-option package more than doubled conversion to that option. Rory cites this as a demonstration of social epistemology: under uncertainty, people treat the aggregated choices of others as informative evidence about what is correct or valuable. Descriptive norms → cheap to implement → can outperform price reductions and feature additions as conversion tools.

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Pill colour study (Bakalev & Cofield, 1982)

Research by Bakalev and Cofield (1982) found that pill colour alters physiological effect independently of the active compound: blue pills produced stronger sedative responses while red pills produced stronger stimulant effects. Rory uses this to challenge the assumption that only the biochemical ingredient matters, arguing that perceived properties are inseparable from real effects. The study supports his broader claim that the mind responds to signals and cues, not just to physical reality.

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Post Office first-class mail delivery rate perception study (UK)

Research conducted for the UK Post Office found that first-class mail achieved a 98% next-day delivery rate, yet customers estimated the success rate at only 50–60%. Rory uses this to argue that improving perception is often radically more cost-effective than improving performance: the service was already excellent, but customers were unaware of it. Spending billions closing a small performance gap made far less sense than simply communicating the existing success rate.

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Pratfall Effect studies

The Pratfall Effect, identified by social psychologist Elliot Aronson, is the finding that a highly competent person becomes more likeable after committing a minor blunder, because the mistake signals humanness and approachability. Rory applies this to brands and advertising, arguing that confessing a limitation → as Avis did with ‘We try harder’ → builds more trust than projecting flawless superiority. Perfection reads as suspicious; a small admitted imperfection functions as a credibility signal.

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Prospect theory certainty premium

Prospect theory’s certainty premium is illustrated by a question Sutherland posed to Daniel Kahneman: almost no one chooses a 51% chance of $470,000 over a 50% chance of $500,000, despite the former having a higher expected value → people pay $30,000 in expected winnings to stay at the psychologically comfortable 50% threshold. Rory uses this to show that certainty commands an irrational premium far beyond what probability calculations justify, with direct implications for product guarantees, pricing, and risk framing.

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Prussian Iron Cross jewellery experiment (1812-13)

The Prussian Iron Cross jewellery experiment refers to a patriotic campaign during the Napoleonic Wars in which wealthy Prussians donated their gold jewellery in exchange for cast-iron replicas inscribed ‘Gold gab ich für Eisen’ → I gave gold for iron. The iron pieces became the highest-status items in Prussian society for decades afterwards because they signified sacrifice rather than wealth. Rory cites this to show that meaning, not material value, determines perceived worth → and that context can invert the normal relationship between cost and prestige.

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Ray Kroc / Eight Shake Machines Anomaly

Ray Kroc was a milkshake machine salesman who noticed an anomalous order for eight machines from a single small restaurant in San Bernardino, California → an outlier that drew him to investigate and ultimately led him to franchise McDonald’s into the world’s largest fast-food chain. Rory uses the story to argue that averages destroy the most valuable signal in data: the outlier, not the mean, is where actionable intelligence lives. Optimising for typical performance means systematically ignoring the information most worth acting on.

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Red traffic light countdowns (Korea vs China)

South Korea introduced countdown timers on red traffic lights and found they reduced driver frustration, road rage, and accident rates. China applied the same principle to green lights → prompting drivers to accelerate toward a green about to expire → and accidents increased instead. Rory uses the comparison to show that context determines whether an intervention is beneficial or harmful; the structural logic was identical, but the behavioural consequences were opposite.

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Regenerative braking energy recovery display (Tesla)

Tesla’s dashboard displays the proportion of kinetic energy recovered during regenerative braking, often returning a figure close to 100% and turning deceleration into a visible positive achievement. Rory cites this as a live example of psycho-logic: no energy is being created, but framing a loss as a recovery transforms the emotional experience of slowing down. It demonstrates that directing consumer attention to a different metric can fundamentally change satisfaction without altering the underlying physical reality.

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Register vs. Continue button ($300M revenue increase)

A widely cited UX experiment found that replacing a ‘Register’ button at e-commerce checkout with a ‘Continue’ button → removing the implication of a long-term commitment → reportedly generated $300 million in additional annual revenue. Rory uses this as evidence that psychological friction at key decision moments has commercial consequences entirely disproportionate to the technical cost of the change. The same product, the same checkout flow, and a single word produced a result that no engineering improvement could have matched.

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Richard Doll’s Smoking Research

Epidemiologist Richard Doll’s research in the 1950s conclusively established the causal link between cigarette smoking and lung cancer, one of the most consequential findings in public health history. His studies also showed that quitting before age 35 largely eliminates long-term mortality risk → a finding that public health authorities chose not to publicise widely, fearing it would license young people to start smoking with a plan to quit later. Rory cites the deliberate suppression of this second finding as a rare, arguably justified instance of distorting the presentation of evidence for behavioural ends.

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Rory’s parallel EV running experiment

Sutherland describes an informal experiment in which prospective electric vehicle buyers were offered a four-day trial of an EV while keeping their petrol car; within days, most participants were using the electric car five times more often and concluded the petrol vehicle was redundant. He proposes this parallel-trial model as the correct approach to EV adoption → it removes range anxiety and habit-lock without requiring persuasion, allowing behaviour to update organically once the psychological barrier of commitment is absent.

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Royal Mail customer satisfaction paradox (Alex Batchelor)

A customer satisfaction study of Royal Mail, associated with marketer Alex Batchelor, found that satisfaction scores had no meaningful correlation with objective service quality metrics such as delivery speed or accuracy. The sole predictor of customer satisfaction was whether the customer liked their individual postman. Rory cites this as evidence that human relationships overwhelm rational service assessments → and that investing in measurable operational performance may have almost no bearing on how customers actually feel.

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Royal Mail first-class delivery perception gap

Royal Mail’s first-class post achieved approximately a 98% next-day delivery success rate, yet public surveys found the average estimate of that rate was only 50–60%. Rory uses the gap to argue that improving operational reality delivers near-zero reputational benefit when the public’s mental model is so far below actual performance. The rational intervention is to fix perception first → since further investment in delivery speed yields almost no return while the belief gap remains.

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Safety gloves vulnerability experiment

A study redesigned safety gloves to make wearers feel slightly more vulnerable during tool use, finding a 20% increase in perceived vulnerability with circular saws and 40% with Stanley knives compared to standard gloves. Rory cites this to argue that the subjective sense of risk is the key behavioural variable in safety outcomes → better-fitting, more protective gloves can paradoxically increase accidents by inducing overconfidence. Removing a degree of felt invincibility may be a more effective safety intervention than adding more physical protection.

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Sharpie pen experiment

The Sharpie pen experiment demonstrates that identical products are valued differently depending solely on how they are labelled. Adding an oddly coloured pen to a set of ten lowers willingness to pay, but relabelling it a ‘free highlighter’ raises willingness to pay above the original baseline. Rory uses this to show that value is not intrinsic to an object but is constructed through psychological framing.

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Smallpox vaccination marketing

Edward Jenner’s smallpox vaccine was scientifically sound but faced mass public resistance until a crucial marketing breakthrough accelerated adoption: persuading the King of England to vaccinate his own children. This single act of royal endorsement functioned as supreme social proof, making the intervention credible to a sceptical public. Rory cites it to argue that solving a problem of trust or social signalling can matter as much as solving the underlying technical problem.

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Smiley face speed signs experiment

Smiley and frowny face speed signs are roadside displays that show drivers their speed alongside an emoticon indicating whether they are within the limit. At roughly 10% of the cost of a conventional speed camera, they reduce accidents at twice the rate. Rory uses this as evidence that the mild social discomfort of a frowning face is a more powerful behavioural lever than a £60 fine and penalty points.

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Software subscription cancellation call experiment → Ogilvy Change

The software subscription cancellation experiment, run by Ogilvy Change, changed a single question in a retention call → from ‘why are you cancelling?’ to ‘why did you first buy this product?’ The shift reconnected customers with their original motivations and generated an estimated £2 million per year in retained revenue. Rory cites it as proof that reframing a conversation can unlock enormous commercial value at near-zero cost.

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South African fast food price increase → Rory’s recommendation

A South African fast food product that was failing to sell was turned around not by improving the product but by raising its price. Items priced between ‘bargain’ and ‘treat’ lack a clear emotional rationale for purchase; a higher price gave the product a plausible treat identity. Rory uses this to argue that price is not just a signal of cost but a cue that shapes how people feel about consuming something.

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Stockholm Congestion Charging trial

Stockholm’s congestion charge was introduced as a time-limited trial in 2006, during which traffic fell 22% and air pollution dropped 14%. After experiencing the benefits firsthand, citizens who had initially opposed the scheme voted in a referendum to make it permanent. Rory cites it to distinguish stated preferences from revealed preferences → people frequently cannot predict how they will feel about a change until they have actually lived through it.

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Sullenburger / Hudson River landing

Captain Chesley Sullenberger’s 2009 emergency landing on the Hudson River, after both engines failed on takeoff, required a split-second choice between two airports and the river. Sullenberger later credited his glider training with giving him an instinctive feel for energy and glide ratios that made the calculation automatic. Rory uses it as a vivid example of System 1 expertise → embodied heuristics outperforming deliberate calculation when time does not permit analysis.

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Supermarket cocktail pod experiment

The cocktail pod experiment involved placing a pre-assembled kit → ice, mixers, and garnishes → at the point in a supermarket aisle where shoppers typically decide what to drink that evening. Spirits sales in participating stores rose by around 8% without any change to price or product. Rory cites it to illustrate path dependency: the moment and location at which something is encountered can be as commercially important as what the product actually is.

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Survivorship Bias / Abraham Wald Bullet Holes

Abraham Wald’s World War II analysis showed that US Air Force planners were wrong to reinforce the parts of returning aircraft most frequently hit by enemy fire. Those planes had survived precisely because those areas were not critical → the aircraft that never returned were hit elsewhere, and that missing data was the signal that mattered. Rory uses it as the canonical illustration of survivorship bias, warning against drawing conclusions from structurally incomplete data.

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Taco Bell location failure analysis

When the first UK Taco Bell location failed, the obvious interpretation was that British consumers simply did not want the product. Rory Sutherland’s observation was more prosaic: the entrance was hidden in a back alley, making the restaurant nearly impossible to find. Rory cites it as a warning about causal inference → inaccessibility and low demand produce identical-looking sales data, and mistaking one for the other leads to entirely wrong conclusions.

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The “50% Extra Free” Accidental Experiment

A consumer goods company accidentally ran a promotion offering fifty percent extra free while simultaneously raising the price by fifty percent, meaning customers received no actual financial saving. Sales rose almost as much as a genuine price reduction would have produced, demonstrating that perceived deal value operates largely independently of mathematical reality. Rory cites it as evidence that the psychological framing of an offer can be as commercially potent as the offer itself.

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The “Don’t Mess with Texas” Anti-Littering Campaign

Originally a 1986 Texas Department of Transportation campaign targeting pickup-truck-driving Texan men, the Don’t Mess with Texas initiative used identity-based pride messaging rather than conventional civic duty appeals to reduce roadside litter. It cut litter by seventy-two percent in its first two years, making it one of the most effective behavior change campaigns on record. Rory cites it as proof that anchoring desired behavior to how people already see themselves is more powerful than providing rational arguments for why they should change.

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The 2008 Napa Valley Meeting

A 2008 gathering in Napa Valley brought together behavioral scientists including Daniel Kahneman and Richard Thaler with Silicon Valley founders including Jeff Bezos, Larry Page, Sergey Brin, and Sean Parker. Attendee John Kenney reportedly had the epiphany that behavioral science explained the success of every company in the room → their products worked not through superior engineering but through psychological design. Rory uses the meeting to argue that the most commercially valuable innovations of the tech era were essentially applied behavioral science in disguise.

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The Diamond Shreddies Campaign → Ogilvy Canada

A 2008 Ogilvy Canada campaign relaunched Shreddies breakfast cereal as Diamond Shreddies by rotating the square product forty-five degrees → the cereal was physically identical in every respect. The campaign produced a significant sales uplift, which Sutherland treats as one of the cleanest possible demonstrations that perception is a legitimate and commercially powerful form of value creation. It underpins his argument that changing how something is experienced can be as effective as changing what it actually is.

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The Ed Sheeran Peep Show → Ogilvy Australia

An Ogilvy Australia stunt placed Ed Sheeran inside a peep show booth offering private performances for two dollars a viewing; almost nobody entered during two hours of sitting. Despite Sheeran being a globally famous artist, the peep show framing suppressed demand almost entirely → the context overrode the content. Rory cites it to argue that story and setting determine perceived value more reliably than objective quality or credentials.

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The French Squirrel Bounty → 18th century

An eighteenth-century French government program offered monetary bounties for squirrel tails, intending to reduce squirrel populations causing agricultural damage. Instead, entrepreneurs began breeding squirrels commercially to collect the bounties, causing populations to increase rather than decline. Rory deploys it as a canonical example of a perverse incentive → the point at which straightforward economic logic, applied to a complex adaptive system, reliably produces outcomes opposite to those intended.

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The Save More Tomorrow Pension Scheme → Thaler and Sunstein

Save More Tomorrow is a pension savings mechanism designed by Richard Thaler and Shlomo Benartzi in which employees pre-commit to directing future pay raises into their retirement fund rather than contributing from their current salary. Because contributions come from money employees have never yet received, the scheme sidesteps loss aversion entirely → savings feel like a gain, not a sacrifice. Rory cites the resulting two-hundred-percent increase in pension saving among younger workers as evidence that reformulating the choice architecture can achieve what incentives and information campaigns consistently fail to deliver.

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Tim Hortons drug dealing drive-thru

A Tim Hortons store manager discovered that a male colleague was using Timbits donut hole orders as a coded system to conduct drug transactions through the drive-thru window. Rory tells the story to argue that any delivery infrastructure → including proposed drone delivery networks → will inevitably be co-opted for drug dealing, since human ingenuity in circumventing rules consistently outpaces enforcement. His conclusion is that sensible licensing is a more effective policy response than prohibition.

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Toothpaste / dental hygiene motivation study

Sutherland’s analysis holds that the dominant motivation for toothbrushing is not concern for dental health but fear of bad breath → a case he supports by pointing to the universal use of mint flavoring, which addresses social anxiety rather than oral hygiene. Real psychological drivers are frequently invisible to conscious introspection and rarely match the stated reasons people give for their actions. He uses it to advocate consequentialist thinking in behavior change: if an apparently irrational motivation reliably produces the right outcome, its logical basis is irrelevant.

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Transport for London commuting enjoyment research

Internal Transport for London research found that a substantial proportion of London commuters actually enjoy their daily commute → a finding that TfL officials reportedly asked the researcher to suppress rather than publish. The suppression reveals that institutional models justifying major infrastructure investment depend on commuting being experienced as uniformly miserable; any evidence of commuter satisfaction undermines the political rationale for billions in spending. Rory cites it as a case of institutions systematically ignoring psycho-logical solutions because their cost-benefit frameworks have no mechanism for valuing subjective experience.

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Two dogs / controllable electric shock experiment (learned helplessness)

The learned helplessness experiment, conducted by Martin Seligman in the 1960s, placed two dogs in conditions where both received identical electric shocks → but only one had a button to stop them. The dog without control eventually stopped trying to escape altogether, lapsing into passive depression despite experiencing no greater objective suffering. Rory uses this to argue that perceived agency is a primary driver of wellbeing: it is not what happens to us but our sense of control over it that determines psychological harm.

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Two dogs / learned helplessness experiment

The learned helplessness experiment pairs two dogs receiving identical electric shocks, but only one has a button to halt them; the powerless dog collapses into depression. Cited via Daniel Pink, the experiment illustrates that the circumstances of our lives may matter far less than the degree of control we believe we have over them. Rory invokes this repeatedly to challenge policy and design approaches that improve conditions without restoring agency.

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US 2008 financial crash happiness paradox

Following the 2008 financial crisis, US GDP contracted sharply → yet self-reported happiness levels initially rose, defying the standard assumption that economic output tracks human welfare. Rory cites this as evidence that the relationship between measurable prosperity and lived wellbeing is far weaker than economists assume. It supports his broader argument that optimising for GDP is a poor proxy for what actually makes life feel good.

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Vaccination take-up / two nurses study

A study in developing countries found that vaccination uptake among mothers increased substantially when the programme was redesigned to allow a woman to bring a friend, with both children vaccinated simultaneously by two nurses rather than sequentially. Rory references this to show that social friction → not just access or information → is a decisive barrier to behaviour change. A modest logistical tweak that addresses social dynamics can outperform extensive information campaigns.

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Vaccination with a friend

Research into vaccination programmes found that uptake rose significantly when mothers could attend with a friend and have both children immunised at the same time, rather than going through the process alone. Rory uses this finding to illustrate that behaviour is shaped by social context as much as by rational incentives or belief. Removing the social cost of a decision → the loneliness or stigma of it → can be more effective than any informational nudge.

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Variable Reinforcement (Skinner / Pigeons)

B.F. Skinner’s variable reinforcement experiments showed that pigeons given food pellets on a random, unpredictable schedule pecked compulsively and persistently, whereas those on a fixed schedule quickly became satiated and indifferent. Rory deploys this to explain the addictive design of social media feeds, slot machines, and certain foods → all of which exploit the same neural mechanism. Unpredictability, not reward itself, is the engine of compulsion.

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Westerham Chronicle / Winston Churchill

The Westerham Chronicle, a local English newspaper, once described Winston Churchill in its pages as ‘the former Westerham resident and wartime prime minister’ → leading with his local connection rather than his global historical significance. Rory uses this as a vivid demonstration that context entirely determines which information is treated as most salient: what counts as the figure and what counts as the ground depends entirely on your frame of reference.

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Wine tasting + price perception study (American Institute of Wine Economics)

Research by the American Association of Wine Economists found that, among ordinary drinkers, there is essentially no correlation between the objective quality of a wine and how much pleasure it delivers → unless the price is disclosed, at which point enjoyment tracks price closely. Rory cites this as evidence that price functions not merely as a signal but as a genuine ingredient of the experience itself. It challenges the premise that preference is formed independently of context or expectation.

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