Comparing Cognitive, Metacognitive, and Acceptance and Commitment Therapy Models of Depression: a Longitudinal Study

Longitudinal study (N=106) examining how CT, MCT, and ACT constructs predict depressive symptoms after 9 months. Psychological inflexibility (ACT) longitudinally mediated the effect of depressogenic schemas and metacognitive beliefs on depression, indicating that inflexibility is a relevant transdiagnostic mechanism.