Demonstration of the construct validity, i.e., whether a measure performs as theory would predict, and criterion-related validity, i.e., whether a new measure is related to another commonly-used measure of the same construct, is vitally important to psychometrically supporting the use of a measure (DeVellis, 1991; Nunnally, 1978). These elements of validity for the B-BAES were demonstrated in Study One. Equally important is the ability of a measure to show longitudinal associations with outcomes that the dimensions are theorized to predict. Therefore, the goal of Study Two was to test the predictive validity of B-STIM and B-SED in relation to future binge drinking through a two-year follow up period.
