Reports the specification of a construct of social anxiety, the subsequent development of 2 scales, and validational studies. The Fear of Negative Evaluation Scale (FNE) and the Social Avoidance and Distress Scale (SAD) were given to 358 undergraduates. 3 experiments and other correlational data are presented. People high in SAD tended to avoid social interactions, preferred to work alone, reported that they talked less, were more worried and less confident about social relationships, but were more likely to appear for appointments. Those high in FNE tended to become nervous in evaluative situations, and worked hard either to avoid disapproval or gain approval. Certain convergent and discriminant relationships had been part of the construct of social anxiety, and the correlational data support these differentiations. (17 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved). © 1969 American Psychological Association.