The current study sought to examine whether some mandated students reduce alcohol use more following a PFI than other students, and whether some students respond better to a PFI delivered in the context of a BMI than to a written PFI only. This study aimed to extend the earlier study with the same sample (White et al., 2007) by empirically identifying heterogeneous subgroups of mandated students who differentially respond to a PFI. To achieve this goal, we first analyzed HED and AP based on their change patterns, as well as their overall levels, using the latent change score approach proposed in a recent study (Mun, von Eye, & White, 2009) but with an extension of mixture modeling analysis.2 HED and AP were chosen because reductions in these alcohol use behaviors reflect self-regulated harm reduction better than other alcohol use measures. We then used empirically identified groups as the outcome variable in subsequent logistic regression analyses. We formally tested the following six individual and situational factors as predictors of change in the context of a PFI: incident seriousness, readiness to change,
