Episodes

  • The Psych-Trick Behind One the Decade’s Fastest Growing Orgs

    The Psych-Trick Behind One the Decade’s Fastest Growing Orgs
    Feb 9 2026
    HelloFresh is one of the fastest-growing companies of the past 20 years. And it’s down to one, relatively simple behavioural science tactic. --- Subscribe to the Nudge Vaults: https://www.nudgepodcast.com/vaults See Agent Spark in action at ⁠gwi.com/spark⁠ Read Mehdi’s book: https://amzn.to/48ORuO2 Here's Medhi's website: https://tinyurl.com/ymnu6jty Sign up for my newsletter: https://www.nudgepodcast.com/mailing-list Connect on LinkedIn: https://www.linkedin.com/in/phill-agnew/ Watch Nudge on YouTube: https://www.youtube.com/@nudgepodcast/ --- Today’s sources: Buechel, E., & Li, R. (2022). Mysterious consumption: Preference for horizontal (vs. vertical) uncertainty and the role of surprise. Journal of Consumer Research, 49(6), 987–1004. Norton, M. I., Mochon, D., & Ariely, D. (2012). The IKEA effect: When labor leads to love. Journal of Consumer Psychology, 22(3), 453–460. Skinner, B. F. (1948). “Superstition” in the pigeon. Journal of Experimental Psychology, 38(2), 168–172. BBC News. (2015, August 12). The man who discovered Harry Potter [Video]. YouTube Melanie Wass. (2019, September 16). J.K. Rowling – Insights on creating Harry Potter world [Video]. YouTube.
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    26 mins
  • Real-world examples of cognitive biases

    Real-world examples of cognitive biases
    Feb 2 2026
    Most of us are completely oblivious to the cognitive biases that dictate how we live our lives. Today, with Tom Bowden-Green and Luan Wise, we cover seven cognitive biases that all of us fall for. --- Tom and Luan’s book: https://amzn.to/49aZnh3 Unlock the Nudge Vaults: https://www.nudgepodcast.com/vaults See Agent Spark in action at ⁠gwi.com/spark⁠ Join 10,428 readers of my newsletter: https://www.nudgepodcast.com/mailing-list Connect on LinkedIn: https://www.linkedin.com/in/phill-agnew/ --- Today’s sources: Chambers, J. R. (2008). Explaining false uniqueness: Why we are both better and worse than others. Social and Personality Psychology Compass, 2(2), 878–894. Dunning, D. (2011). The Dunning–Kruger effect: On being ignorant of one’s own ignorance. In Advances in experimental social psychology (Vol. 44, pp. 247–296). Academic Press. Einhorn, H. J., & Hogarth, R. M. (1978). Confidence in judgment: Persistence of the illusion of validity. Psychological Review, 85(5), 395–416. Helmreich, R., Aronson, E., & LeFan, J. (1970). To err is humanizing sometimes: Effects of self-esteem, competence, and a pratfall on interpersonal attraction. Journal of Personality and Social Psychology, 16(2), 259–264. Koskie, M. M., & Locander, W. B. (2023). Cool brands and hot attachments: Their effect on consumers’ willingness to pay more. European Journal of Marketing, 57(4), 905–929. Pronin, E., Lin, D. Y., & Ross, L. (2002). The bias blind spot: Perceptions of bias in self versus others. Personality and Social Psychology Bulletin, 28(3), 369–381. Van Hoorens, V. (1993). Self-enhancement and superiority biases in social comparison. European Review of Social Psychology, 4, 113–139. White, G. L., Fishbein, M., & Rutstein, R. C. (1981). Passionate love and the misattribution of arousal. Journal of Personality and Social Psychology, 41(1), 56–62.
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    24 mins
  • “This common pricing strategy is completely wrong!” Robert Cialdini

    “This common pricing strategy is completely wrong!” Robert Cialdini
    Jan 26 2026
    “Say you’ve calculated your price and it comes out at £120,121. Most would round it down to £120,000. That’s completely wrong.” That’s what Robert Cialdini told me on the latest episode of Nudge. He also explained why the Prime energy drink first succeeded and then flopped. How Disney kept us hooked on classic movies. And how he applies the authority bias to sell his own products. --- Unlock the Nudge Vaults: https://www.nudgepodcast.com/vaults See Agent Spark in action at ⁠gwi.com/spark⁠ Read Cialdini’s bestseller Influence: https://amzn.to/4prHb7Y Read the new and expanded Influence: https://amzn.to/43TY0jI Read Pre-Suasion: https://amzn.to/48hA6Qr Read Yes! (Containing 60 Psyc-Marketing Tips): https://amzn.to/48ddNNf Join 10,226 readers of my newsletter: https://www.nudgepodcast.com/mailing-list Connect on LinkedIn: https://www.linkedin.com/in/phill-agnew/ --- Today’s sources: Cialdini, R. B. (2021). Influence: The psychology of persuasion (New & expanded ed.). Harper Business. Dunn, E. W., & Norton, M. I. (2013). Happy money: The science of happier spending. Simon & Schuster. Nelissen, R. M. A., & Meijers, M. H. C. (2011). Social benefits of luxury brands as costly signals of wealth and status. Evolution and Human Behavior, 32(5), 343–355. West, S. G. (1975). Increasing the attractiveness of college cafeteria food: A reactance theory perspective. Journal of Applied Psychology, 60(5), 656–658. Wilson, P. R. (1968). Perceptual distortion of height as a function of ascribed academic status. Journal of Social Psychology, 74(1), 97–102. Worchel, S., Lee, J., & Adewole, A. (1975). Effects of scarcity on value perception: The cookie-jar study. Journal of Personality and Social Psychology, 31(5), 791–799.
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    27 mins
  • Robert Cialdini: “This study on 6,700 websites proved my principle!”

    Robert Cialdini: “This study on 6,700 websites proved my principle!”
    Jan 19 2026
    This study analysed 6,700 websites in an unprecedented A/B test. The results proved something that Dr Robert Cialdini had been preaching for years. Today, on Nudge, Robert Cialdini joins me again, covering another of his seven principles of persuasion. And I share a marketing lesson that (I think) every business needs to know. --- Unlock the Nudge Vaults: https://www.nudgepodcast.com/vaults See Agent Spark in action at gwi.com/spark Read Cialdini’s bestseller Influence: https://amzn.to/4prHb7Y Read the new and expanded Influence: https://amzn.to/43TY0jI Read Pre-Suasion: https://amzn.to/48hA6Qr Read Yes! (Containing 60 Psyc-Marketing Tips): https://amzn.to/48ddNNf Join 10,189 readers of my newsletter: https://www.nudgepodcast.com/mailing-list Connect on LinkedIn: https://www.linkedin.com/in/phill-agnew/ --- Today’s sources: Bell, T. [Taylor Bell]. (2025, February 13). Inside Trader Joe’s: The genius strategy behind its cult following (and low prices) [Video]. YouTube. Bornstein, R. F., Leone, D. R., & Galley, D. J. (1987). The generalizability of subliminal mere exposure effects: Influence of stimuli perceived without awareness on social behavior. Journal of Personality and Social Psychology, 53(6), 1070–1079. Browne, D., & Swarbrick-Jones, A. (2017). The science of persuasion in e-commerce: An analysis of 6,700 online A/B tests. Conversion Rate Experts. Danziger, S., Levav, J., & Avnaim-Pesso, L. (2011). Extraneous factors in judicial decisions. Proceedings of the National Academy of Sciences of the United States of America, 108(17), 6889–6892. Drachman, D., deCarufel, A., & Insko, C. A. (1978). The extra credit effect in interpersonal attraction. Journal of Experimental Social Psychology, 14(5), 458–465. Fang, X., Singh, S. N., & Ahluwalia, R. (2007). An examination of different explanations for the mere exposure effect. Journal of Consumer Research, 34(1), 97–103. Gladka, A., & Żemła, M. (2016). Effectiveness of reciprocal rule in tourism: Evidence from a city tourist restaurant. European Journal of Service Management, 17(1), 57–63. Mita, T. H., Dermer, M., & Knight, J. (1977). Reversed facial images and the mere-exposure hypothesis. Journal of Personality and Social Psychology, 35(8), 597–601. Nicholson, C. Y., Compeau, L. D., & Sethi, R. (2001). The role of interpersonal liking in building trust in long-term channel relationships. Journal of the Academy of Marketing Science, 29(1), 3–15. Razran, G. (1940). Conditioned response changes in rating and appraisal. Psychological Bulletin, 37(6), 481–493. Shotton, R. (2023). The illusion of choice: 16½ psychological biases that influence what we buy. Harriman House. Strohmetz, D. B., Rind, B., Fisher, R., & Lynn, M. (2002). Sweetening the till: The use of candy to increase restaurant tipping. Journal of Applied Social Psychology, 32(2), 300–309. Zajonc, R. B., & Rajecki, D. W. (1969). Exposure and affect: A field experiment. Psychonomic Science, 17(4), 216–217.
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    27 mins
  • The Secret Behind KFC’s Success

    The Secret Behind KFC’s Success
    Jan 12 2026
    KFC keeps its recipe secret. It’s stored in a vault in an unknown location. Only two KFC executives know the ingredients. Neither are allowed to fly on the same plane. But this secrecy is illogical. The recipe isn’t important. Today on Nudge, Richard Shotton explains how the secrecy makes customers more loyal. He shares his favourite ad of all time, and we run one of his experiments on you. --- Read Richard’s book: https://a.co/d/fEW7amQ Sign up for my newsletter: https://www.nudgepodcast.com/mailing-list Connect on LinkedIn: https://www.linkedin.com/in/phill-agnew-22213187/ Watch Nudge on YouTube: https://www.youtube.com/@nudgepodcast/ --- Today’s sources: Heimbach, J. T., & Jacoby, J. (1972). The Zeigarnik effect in advertising. Advances in Consumer Research: Proceedings of the 3rd Annual Conference of the Association for Consumer Research, 746–757. Loewenstein, G. (1994). The psychology of curiosity: A review and reinterpretation. Psychological Bulletin, 116(1), 75–98.Zeigarnik, B. (1927). Über das Behalten von erledigten und unerledigten Handlungen. Psychologische Forschung, 9(1), 1–85.
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    24 mins
  • Why is it so hard to say no?

    Why is it so hard to say no?
    Jan 5 2026
    In 1963, the Milgram experiments revealed something unsettling. Most people kept administering what they believed were painful electric shocks, not because they wanted to, but because they couldn’t bring themselves to say no. In this episode, my guest shares why we agree to extra projects, unpaid favours and unreasonable requests even when we know we shouldn’t. I’m joined by behavioural scientist and physician Dr Sunita Sah of Cornell University. She studies how social pressure and conflict-of-interest disclosures can quietly steer us toward yes. --- Read Sunita’s book Defy: https://amzn.to/48LsreG Unlock the Nudge Vaults: https://www.nudgepodcast.com/vaults Join 10,428 readers of my newsletter: https://www.nudgepodcast.com/mailing-list Connect on LinkedIn: https://www.linkedin.com/in/phill-agnew/ --- Today’s sources: Milgram, S. (1963). Behavioral study of obedience. Journal of Abnormal and Social Psychology, 67(4), 371–378. Sah, S. (2025). Defy: The power of no in a world that demands yes. One World. Sah, S., Loewenstein, G. F., & Cain, D. M. (2013). The burden of disclosure: Increased compliance with distrusted advice. Journal of Personality and Social Psychology, 104(2), 289–304. Sah, S., Loewenstein, G. F., & Cain, D. M. (2019). Insinuation anxiety: Concern that advice rejection will signal distrust after conflict of interest disclosures. Personality and Social Psychology Bulletin, 45(7), 1099–1112. Woodzicka, J. A., & LaFrance, M. (2001). Real versus imagined gender harassment. Journal of Social Issues, 57(1), 15–30.
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    31 mins
  • The top 9 tips from 55 Nudge episodes in 2025

    The top 9 tips from 55 Nudge episodes in 2025
    Dec 29 2025
    In today’s special end-of-year episode, you’ll hear the best insights from Nudge in 2025. Hear from Prof. Gerd Gigerenzer, Richard Shotton, Bas Wouters, Philip Graves, Prof. Matt Johnson and a Behavioural Insights Team director. ---- Subscribe to the Nudge Vaults: https://www.nudgepodcast.com/vaults Sign up for my newsletter: https://www.nudgepodcast.com/mailing-list Connect on LinkedIn: https://www.linkedin.com/in/phill-agnew/ Watch Nudge on YouTube: https://www.youtube.com/@nudgepodcast/ ---- Today’s Sources: Beilock, S. L., Bertenthal, B. I., McCoy, A. M., & Carr, T. H. (2004). Haste does not always make waste: Expertise, direction of attention, and speed versus accuracy in performing sensorimotor skills. Psychonomic Bulletin & Review, 11(2), 373–379. Bellaiche, L., Shahi, R., Turpin, M. H., Ragnhildstveit, A., Sprockett, S., Barr, N., & Seli, P. (2023). Humans versus AI: Whether and why we prefer human-created compared to AI-created artwork. Cognitive Research: Principles and Implications, 8(1), 42. Groen, J., & Wouters, B. (2020). Online Influence: Boost your results with proven behavioral science. Amazon Digital Services LLC. Milkman, K. L., Patel, M. S., Gandhi, L., Graci, H. N., Gromet, D. M., Ho, H., Kay, J. S., Lee, T. W., Akinola, M., Beshears, J., Bogard, J. E., Buttenheim, A. M., Chabris, C. F., Chapman, G. B., Duckworth, A. L., Goldstein, N. J., Goren, A., Halpern, S. D., John, L. K., ... & Van den Bulte, C. (2021). A megastudy of text-based nudges encouraging patients to get vaccinated at an upcoming doctor’s appointment. Proceedings of the National Academy of Sciences, 118(20), e2101165118. Nisbett, R. E., & Wilson, T. D. (1977). Telling more than we can know: Verbal reports on mental processes. Psychological Review, 84(3), 231–259. van den Broek, E., & den Heijer, T. (2024). The Housefly Effect. Bedford Square Publishers. Vennard, D., Park, T., & Attwood, S. (2019). Encouraging Sustainable Food Consumption By Using More-Appetizing Language.
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    29 mins
  • The nudge that persuaded Aussies to stop speeding

    The nudge that persuaded Aussies to stop speeding
    Dec 22 2025
    How would you encourage Australians to drive slower? That’s what today’s guest on Nudge, Adam Ferrier, had to do. Being an applied behavioural scientist, he tackled this challenge in a novel way. Listen to hear about his interesting campaign, how Jaws killed surfing and the secret behind Derren Brown’s “hypnosis” trick. --- Watch the bonus episode: https://nudge.kit.com/66dcb18641 Adam’s agency: https://thinkerbell.com/ Adam’s books: https://amzn.to/431eYfD Sign up for my newsletter: https://www.nudgepodcast.com/mailing-list Connect on LinkedIn: https://www.linkedin.com/in/phill-agnew-22213187/ Watch Nudge on YouTube: https://www.youtube.com/@nudgepodcast/ --- Today’s sources: Cialdini, R. B. (1984). Influence: The psychology of persuasion. William Morrow. Shotton, R. (2023). The illusion of choice: 16½ psychological biases that influence what we buy. Harriman House. Sutherland, S. (1992). Irrationality: The enemy within. Constable.
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    21 mins