METHODS: This investigation included three studies across large undergraduate (N = 411; 52.3% male; mean [M] age = 19.6) and clinical (N = 684; 61.4% female; M age = 35.8) samples, involving the administration of the MASA item pool and existing measures of related constructs.
RESULTS: Through a series of psychometric evaluations, the initial 466-item pool was reduced to a final 38-item measure that represented 6 distinct scales with adequate model fit, internal consistency, test-retest reliability, and convergent and discriminant validity.
CONCLUSIONS: Together, these studies likely will lead to additional research and advances in the development of the hybrid models of the mood and anxiety disorders through the dissemination and administration of the MASA.