Measures of depressive dimensions: are they interchangeable?

Several theorists have posited two focuses for depressive experience and/or vulnerability: dependency and rejection, and self-criticism and failure. In turn, three instruments have emerged, each addressing these two components, respectively: the Depressive Experiences Questionnaire (DEQ; Dependent and Self-Critical scales), the Sociotropy-Autonomy Scales (SAS), and the Anaclitic and Introjective Dysfunctional Attitude Scales (DAS). In this study, we addressed the relations within and among these three pairs of scales in a large undergraduate sample. Generally, the DEQ-Dependent, SAS-Sociotrophy, and DAS-Anaclitic scales showed substantial convergent and discriminant validity. Although this was true also for the DEQ-Self-Critical and DAS-Introjective scales, neither scale was closely related to the SAS-Autonomy scale, which appeared instead to be a better measure of counter dependency than a measure of self-critical, introjective features.