The multiple-step strategy for hierarchical regression analysis suggested by Tellegen et al. (1982) involves an initial entry of standardized trait level and standardized traitedness as main effects upon the pertinent dependent variable. At the next level of the hierarchical analysis, the two-way interaction between these terms is entered. It was hypothesized that significant interactions would be observed indicating that the continuum is more valid for those individuals who fit a normative model of alcohol dependence severity than those who do not fit the model. These regressions were conducted for all of the concurrent validating variables described above, as well as for treatment outcome (defined as % days abstinent and drinks per drinking day) as assessed following treatment and at one-year post-treatment follow-up.
