The distinction between shyness and social anxiety remains unclear in the literature. In an attempt to shed further light on this issue, our research evaluated whether shyness and social anxiety were the same construct underlying various measurement scales. Participants (N = 801, Mage = 36.21, range = 18-74, female = 53.10%) responded to 10 questionnaires assessing either shyness or social anxiety. Evidence indicated that the scales were highly correlated and loaded onto 1 factor. Confirmatory factor analysis corroborated this finding. A second exploratory factor analysis revealed that all the shyness and social anxiety items best loaded together onto 3 factors: one corresponding to fear of negative evaluation, embarrassment, self-consciousness, scrutiny, authority, interaction anxiety, and shyness (71.0%); a second comprised of primarily interaction anxiety and shyness (17.7%); and a third associated with performance anxiety (7.5%). All scales were similarly discriminated from sociability. Overall, the constructs of shyness and social anxiety were not differentiated from each other. Researchers should carefully consider what items are included in shyness and social anxiety scales if these constructs are to be distinguished from one another.