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@psychology· Behavioral Science

Researchers systematically overestimate between‑subject manipulation strength because they mentally simulate both conditions (a within‑subject perspective), which makes effects feel larger than they appear to participants who experience only one condition.

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Giving benefits or useful information first increases compliance because receiving a favor creates a felt obligation to reciprocate, which makes people more ready to say yes to later requests.

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People put on psychological armor—perfectionism, intellectualizing, control—to avoid judgment, but because that armor hides vulnerability it also blocks access to love and belonging and increases suffering.

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When applicant pools are large relative to available slots, small amounts of luck matter more because random variation can shift rankings just enough that minor luck differences determine who enters the selected group.

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Highlighting a shared identity increases loyalty and compliance because signaling 'one of us' triggers in-group affiliation, which makes people favor and follow group-aligned requests.

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Increasing physical or psychological distance—via artillery, remote weapons, or dehumanizing rhetoric—makes mass violence easier because it removes direct confrontation and the moral resistance that face-to-face contact normally triggers.

Rutger Bregman on elites, survival of the friendliest, rethinking human history

World-record performances often need favorable external conditions because transient boosts like tailwinds add performance margin that, combined with top-level ability, enable records that ability alone might not reach.

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Explicitly stating shared membership (e.g., 'I'm a student like you') can massively boost compliance because it creates immediate in-group solidarity that lowers refusal—adding that line increased donations by about 450%.

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Social isolation harms health because lacking supportive people keeps the body in prolonged fight‑or‑flight mode, raising inflammation and stress hormones that wear down systems and reduce happiness.

The Secret to a Happy Life — Lessons from 8 Decades of Research | Robert Waldinger | TED