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The following study investigated the effect of poker competition on testosterone (T) responses. Thirty-two participants played one-on-one poker in a lab on campus. Saliva samples were obtained before and after the poker games. On average, participants produced a significant increase in T during the competition, with no difference between winners and losers. This study is the first of its kind to examine T responses in a gambling competition. Possible implications for destructive gambling behaviors are discussed.
Source: “The Deal on Testosterone Responses to Poker Competition” from Current Psychology, Volume 29, Number 1, 45-51
For a deeper look at that much maligned hormone, I recommend this book.
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