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ABSTRACTThis study examined the effect of collective efficacy on group functioning across a series of cognitive tasks. Specifically, this experiment used performance feedback to manipulate efficacy levels in order to investigate the effect of efficacy on group goal setting, task persistence, and overall performance. The effect of experimental manipulations and sequence were investigated at both the task specific (prediction for current task) and general efficacy (estimates of general competence on such tasks) levels.Finally, group behavior was examined across a series of tasks in order to investigate the dynamic properties of collective efficacy.Seventy-five 3-person groups worked on four different cognitive tasks. Groups were assigned to one of three conditions-high efficacy, low efficacy or a no-efficacy control. Collective efficacy was manipulated using bogus performance feedback:positive (high), negative (low) and no feedback (control). An extremely difficult analytical reasoning problem (all groups failed the problem) was used to create failure on the third task. General collective efficacy was assessed immediately following task performance, prior to performance feedback. Task specific efficacy was measured prior to task performance, immediately following feedback from the previous task. Goal setting and persistence were examined on the final task. Scores on Task 2 and Task 4 were used to measure performance as a function of collective efficacy.Performance feedback had the expected effects on both specific and general efficacy. In general, groups receiving positive feedback (i.e., high efficacy condition) recorded higher general efficacy ratings and had stronger performance expectations for vii upcoming tasks than groups receiving negative feedback (low efficacy condition). As predicted, both assessments varied across time of measurement depending upon condition.In terms of outcomes, collective efficacy did have a significant effect on task persistence, with high efficacy groups spending more time on Task 4 than low efficacy groups. Low efficacy groups also set significantly lower goals for performance than control groups. Contrary to predictions, however, efficacy levels did not influence performance on either Task 2 or Task 4. Performance effects were in the expected directi...