Techniques borrowed from sensory psychophysics were used in two studies examining nervousness and tension associated with the anticipation of performing in front of an audience. In Study 1, a laboratory experiment, performance apprehension increased as a multiplicative power function of audience size and status but decreased as a power function of the number of performers. In Study 2, a correlational field study, performers in a university Greek Week talent show who appeared as members of large acts reported less nervousness and tension than performers who appeared in small acts, and again, an inverse power function provided a good fit to the data. The results support the combination of Latane's theory of social impact and Modigliani's theory of embarrassment. Implications for social facilitation and affiliation theories and for performers are discussed.Stage fright is a highly negative and anxiety arousing, if transitory, emotion. Endler, Hunt, and Rosenstein (1962) described 11 traumatic activities to college students and had them rate how anxious they would be in each. "Reading a speech before a large group" was ranked second only to "crawling along a ledge high on a mountainside" but substantially higher than "taking a final exam in an important course" and "being alone in the woods at night." Short of extreme physical danger, stage fright seems to be one of the more tension arousing of the short-term experiences that people encounter.Stage fright or performance apprehension presumably reflects a fear of embarrassment. Modigliani (1968) defines embarrassment as a situation-specific loss of self-esteem when being evaluated by others. That is, the emotional distress of embarrassment is brought about by the fear that others are