Episode Details

What happens when the world actually gets safer? Your brain just moves the goalposts. In this episode, we explore prevalence-induced concept change—the psychological phenomenon where threat detection expands to maintain constant fear, even as real dangers decline. We dig into Harvard's elegant experiments with colored dots, threatening faces, and research ethics, revealing how algorithmic feeds exploit your brain's broken threat detection system. Key Timestamps: 00:00 - Opening: What happens when things actually get safer? 02:00 - The core paradox: Why safety feels the same as danger 04:30 - Introducing Lavari and Gilbert's experiments at Harvard 08:00 - The blue dots study: How your brain recalibrates threat 10:00 - Threatening faces: When neutral becomes scary 12:30 - The ethics proposal study: Moving the safety goalposts 15:00 - The twist: Why warnings and incentives can't break the pattern 17:30 - Implications for feeds, anxiety, and modern paranoia --- Sources & further reading: • David Levari, Daniel Gilbert, Timothy Wilson, Beau Sievers, David Amodio, Thalia Wheatley — "Prevalence-induced concept change in human judgment": https://www.science.org/doi/10.1126/science.aap8731 • Nick Haslam — "Concept Creep: Psychology's Expanding Concepts of Harm and Pathology": https://www.tandfonline.com/doi/full/10.1080/1047840X.2016.1082418 • William Brady & Molly Crockett — "How social learning amplifies moral outrage expression in online social networks": https://www.science.org/doi/10.1126/sciadv.abe5641 • David Levari — "Range-frequency effects can explain and eliminate prevalence-induced concept change": https://www.sciencedirect.com/science/article/abs/pii/S0010027722001846 • Nick Haslam & Brodie Dakin — "Harm inflation: Making sense of concept creep": https://www.tandfonline.com/doi/full/10.1080/10463283.2020.1796080 • Nick Haslam — "Concept Creep and the Mental Health Crisis" (2026): https://doi.org/10.1111/sipr.70007 • William Brady, K. McLoughlin, M. Torres, K. Luo, M. Gendron, Molly Crockett — "Overperception of moral outrage in online social networks inflates beliefs about intergroup hostility": https://www.nature.com/articles/s41562-023-01582-0 • Sven Speerforck et al. — PICC for mental illness perceptions (2024/2026): https://pmc.ncbi.nlm.nih.gov/articles/PMC12904865/ • Sean Devine et al. — "Human Ageing is Associated with More Rigid Concept Spaces": https://link.springer.com/article/10.3758/s13423-022-02197-8 • Knight First Amendment Institute — engagement-based ranking amplification study: https://knightcolumbia.org/content/engagement-user-satisfaction-and-the-amplification-of-divisive-content-on-social-media • Nick Haslam, Jesse Tse, Simon De Deyne — "Concept Creep and Psychiatrization" — (published in Frontiers in Sociology, 2021) • Steven Pinker — Better Angels of Our Nature (2011) and Enlightenment Now (2018) — (books) • Peter Suber — The Paradox of Self-Amendment: A Study of Logic, Law, Omnipotence, and Change (1990, describes Nomic) — (book) This podcast episode was fully generated by AI — research, script, voices, and production. Built with Claude, Piper TTS, and automated pipeline tooling.