Cooperative, Trusting Behavior as a Function of Ethnic Group Similarity-Dissimilarity and of Immediate and Delayed Reward in a Two-Person Game. Part of the Final Report.

One hundred and forty-four Mexican-American, Negro, and Anglo-American, five-and six-year-old "Head Start" children (72 males and 72 females) took part in a 2-person, 2-choice game. They could choose to cooperate or compete with another child on a total of 50 trials. The subjects were divided into groups consisting of similar and dissimilar ethnic-group pairs. The groups of similar and dissimilar ethnic-group pairs were in turn divided into immediate and delayed reward groups. Males and females were divided equally between all combinations of ethnic-group pairing and type of reinforcement. Three 2X6X6 analysis of variance designs were used to analyze 2 types of reward, 6 ethnic pairings, and 6 blocks of 5 trials. The sexes were first analyzed together and then

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