Power posing: brief nonverbal displays affect neuroendocrine levels and risk tolerance
The original study found that expansive postures produced changes in testosterone, cortisol, and self-reported feelings of power. The hormonal findings have been subject to significant replication challenges since 2015 — including a public statement by lead author Carney — and should not be treated as settled. The finding that posture affects subjective feelings of power and confidence has shown more consistent support across subsequent studies.
Note: The hormonal claims in this paper are contested. The application below draws on the more robust finding regarding posture and felt confidence.