In recent years, the field of emotion regulation has advanced current conceptualizations of many forms of psychopathology. Difficulties with emotion regulation have been detected via self-report in several anxiety and depressive disorders, and in particular, generalized anxiety disorder (GAD). However, there is a paucity of research examining emotion regulation ability in this population, leaving open the possibility that self-report measures reflect an individual’s perception of his/her emotion regulation skills rather than skills themselves. The present study examined the utility of an ability-based measure of emotional intelligence in the assessment of emotion-related deficits in GAD as well as the concordance between the ability-based measure and self-reports of emotion regulation skills. Results revealed that individuals with GAD demonstrated significantly more difficulty regulating their emotions than control participants did on both ability-based and self-report measures. Further, these measures showed a moderate concordance with each other. Findings suggest it will be important to integrate ability-based measurement of emotion-related deficits with other assessment modalities.