ABSTRACT
Depression is a complex disorder with both psychological and biological aspects. Animal models for inducing depression include separation-loss, learned helplessness (exposure to uncontrollable life events), and biochemical depletion, and each has found expression in etiological models of depression in humans (Hollon et al., 2002). Treatments for depression run the gamut from dynamic-interpersonal to cognitive behavioral to pharmacological interventions; all have shown some measure of success (Hollon, Thase, & Markowitz, 2002). Cognitive therapy has been among the most successful of these interventions—it has been shown to be at least as effective as alternative interventions in terms of acute response, and it appears to have an enduring effect not matched by medication treatment (Hollon & Shelton, 2001).
