Randomized trial · 2010
Prejudice and truth about the effect of testosterone on human bargaining behaviour
C. Eisenegger, M. Naef, R. Snozzi, M. Heinrichs, E. Fehr. Nature · N=121.
Single-dose T in women increased fair ultimatum offers. Belief that one received T — regardless of actual drug — increased unfairness. The folk hypothesis moved behavior more than the molecule in the belief arm.
Open sourcedoi:10.1038/nature08711PMID 19997098
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What Causes What. “Prejudice and truth about the effect of testosterone on human bargaining behaviour.” https://whatcauseswhat.org/papers/p-eisenegger-2010 (atlas updated 2026-09-02).