The MMPI and problem drinking: statistical controls and multifactor criteria

Relationships between sociodemographic variables and the MMPI, on the one hand, and several dimensions of problem drinking, on the other, were examined from a multiple regression strategy that enhanced control and clarified sizes of effects. To investigate a sample of 385 persons convicted on drunk driving, a plan was implemented calling for entry of five sociodemographic variables first in equations, to assess and control for their effects, before entering 14 MMPI validity and clinical scales, and entering finally product terms representing sex-by-MMPI interactions. These factors were used to predict six problem drinking criteria, all continuous, based on factors and total scores from the Michigan Alcoholism Screening Test (MAST). Results indicate substantial variance attributable to personality factors in comparison with sociodemographic ones, and a pattern of prediction confirming generalizations reported in the literature, but also qualifying them by indicating confounding and interactions.