Why an NLP site hosts this page: posture-to-state effects are sold constantly in our field, and here is a flagship case where the strong claims fell under replication while the weaker ones stood. The practice standard it teaches: prefer the modest claim that survives scrutiny (posture shifts subjective confidence) over the dramatic one that briefly conquered TED.
Power Posing: The Replication Lesson
Amy Cuddy's power-posing effects — hormonal changes from posture — largely failed replication; the subjective-confidence bump partially survived. The most useful cautionary tale in body-language science.
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ShriViral Manek, Institute of NLP India · reviewed 30 Sept 2026