Abstract
This study sought to determine whether personality variables are related to the disposition to cooperate in a two-person non-zero sum game. Thirty-seven medical students played a 30 trial game for money. The opponent was a "stooge" who made 30 unconditionally cooperative choices. The mean number of non-cooperative choices was 18. On the Gough Adjective Check List, extreme non-cooperators scored significantly higher on need aggression and autonomy; extremely cooperative subjects scored higher on need abasement and deference. No significant differences were obtained for nurturance and dominance.

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