Group- two or more ppl who, for longer than a few moments, interact w.& influence one another & perceive one another as “us” co-actors- co-participants working individually on a noncompetitive activity Social facilitation- (1) tendency of ppl to perform simple or well-learned tasks better when others are present (2) the strengthening of dominant responses in the presence of others Evaluation apprehension- concern for how others are evaluating us Social loafing- tendency for people to exert less effort when they pool their efforts toward a common goal than when they are individually accountable Free riders- people who benefit from the group but give little in return Deindividuation-loss of self-awareness & evaluation apprehension; occurs in group situations that foster responsiveness to group norms, good or bad. Group polarization- group-produced enhancement of members’ preexisting tendencies; a strengthening of members’ average tendency, not a split within the group Social Comparison
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