Task performance and perceptions of anxiety: averaging and summation in an evaluative setting.

Suggests that individuals' "stage fright," or perceptions of anxiety and performance, is a function of tendencies to both average and summate the impact of audience members. We found that under certain conditions adding an evaluative member to an audience decreased anxiety, whereas in other conditions the addition of evaluative members increased anxiety. These results are not expected from social impact theory or social facilitation research and suggest that individuals do not react to groups of individuals in a manner analogous to the way in which trait information is typically averaged in forming impressions of individuals (Anderson, 1981). An averaging-summation model that does account for these findings is presented. This research has implications for research on crowding, stress, social influence, and affective responses.