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  • Title: Effects of ability- and chance-determined competition outcome on testosterone.
    Author: van Anders SM, Watson NV.
    Journal: Physiol Behav; 2007 Mar 16; 90(4):634-42. PubMed ID: 17223140.
    Abstract:
    Winning competitions has been shown to lead to higher testosterone (T) relative to losing in men and males of other species. In Experiment 1, 38 women and 37 men provided a saliva sample, completed a novel computer-based vocabulary competition task at which they won or lost based on their own ability, provided feedback about the competition via questionnaire, and then produced a second saliva sample. Task outcome and performance was not sexually differentiated, and overall task performance was negatively correlated with T. Male but not female winners had lower baseline and post-competition T, and male losers had a larger decrease in T from baseline to post-competition. In Experiment 2, 31 men and 43 women completed the same as above, but were randomly assigned to win or lose. In this case, competition outcome did not affect T for men but there was an effect such that women who would have had an ability-determined loss showed a larger decrease in T than women who would have had an ability-determined win. Thus, earned wins appear to attenuate a decline in T in men, consistent with past research into the competition effect and T, and perhaps women under complex circumstances.
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