Revised reinforcement sensitivity theory (r-RST) is a major neuropsychological theory of motivation, emotion, and personality. We report the results of a study that examined the unique relationships of the r-RST constructs with two forms of anxiety: social interaction and social performance. Five hundred and seventy-two adults completed the Reinforcement Sensitivity Theory of Personality Questionnaire (RST-PQ) alongside measures of social interaction anxiety and social performance anxiety. Regression results revealed that, as predicted, both social interaction anxiety and social performance anxiety were linked uniquely and positively with the behavioral inhibition system (BIS) scale score. In addition, social performance anxiety was associated uniquely and positively with the fight-flight-freeze system (FFFS) scale score. The theoretical and clinical implications of the findings for social anxiety are discussed.