Dexamethasone suppression and self-reinforcement correlates of clinical depression

A Comparison of Four Measures of Self-Control Skills

This study compares the psychometric characteristics of four questionnaires designed to assess self-control skills: the Self-Control Questionnaire, the Frequency of Self-Reinforcement Questionnaire, the Cognitive Self-Management Test, and the Lifestyle Approaches Inventory. Content validity was judged to be fairly comparable by three raters in Study 1. In Study 2, convergent and divergent validity support was obtained for all four questionnaires when administered to 369 multiethnic college students, but the relative degree of support varied across constructs. Hence, selection of a self-control instrument may be guided by the target behavior of interest.

Multiple Skill Deficits in Depression

This study involves the description of the presence or absence of several theoretically relevant skill deficits in 35 cases of depression. Until recently, most research and theory about depression has been based on the assumption that this is a homogeneous disorder with one determinant common to all incidences. Theories proposed by Beck (1967), Lewinsohn (1974), Seligman (Abramson, Seligman & Teasdale, 1978), and Rehm (1977) are examples of unitary theories. It is argued that a comprehensive account of depression must involve a multivariate theory such as that proposed by Staats and Heiby (1985). The case study involves a preliminary uncontrolled test of the hypothesis that there exist several skills deficits that may determine depression. The findings suggest support for the possibility that the following skill deficits deserve further investigation for their role in depression aetiology and treatment: logical errors including misattributions, poor self-control skills, poor social skills in terms of excessive aggression and deficit assertiveness, and inadequate hedonic capacity in terms of deficit positive interests and excessive negative interests (anhedonia). Suggestions for future research are offered.