Relationships of biomedical beliefs about depression to treatment-related expectancies in a treatment-seeking sample.

Like other mental disorders, major depression is increasingly explained as a biomedical illness. We examined, in a treatment-seeking sample, whether attributing one's depression to biomedical causes would be associated with pessimistic psychotherapy treatment expectancies. Individuals seeking psychotherapy for depression rated their endorsement of biomedical explanations for their symptoms, expectations regarding treatment outcome, and expectations about forming a working alliance with a therapist. We found that treatment seekers' endorsement of biomedical explanations for their symptoms was associated with pessimism about treatment being successful. This pessimism was, in turn, associated with holding more negative expectancies about one's ability to form a strong therapeutic alliance with a therapist. Given the ascendancy of biomedical explanations for depression and the influence of patient expectancies on clinical outcomes, strategies for disassociating biomedical attributions from pessimistic expectancies may be needed. (PsycInfo Database Record (c) 2021 APA, all rights reserved).