A randomized experiment was carried out in order to test the hypotheses of the interactive effects of Type A-B behavior and group process outcomes with 30 students. Small groups were rated on Bales' activity level, feelings in the group, and task orientation at the beginning and end of sessions. Although groups were initially similar, activity level and positive feelings were higher in the Type B group than in Type A group. The implications for behavioral intervention and long-term outcomes were discussed.
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