Mediators of transdiagnostic group cognitive behavior therapy

Area of Science:

• Clinical Psychology
• Psychotherapy Research
• Anxiety Disorders

Background:

• Cognitive-behavioral therapy (CBT) is a proven treatment for anxiety disorders.
• Mechanisms of change in CBT often involve alterations in cognitive vulnerabilities.
• Transdiagnostic CBT approaches target shared risk factors like negative affectivity (NA), anxiety sensitivity (AS), and intolerance of uncertainty (IU).

Purpose of the Study:

• To investigate the mediating roles of NA, AS, and IU in anxiety reduction within transdiagnostic group CBT.
• To determine if changes in these cognitive vulnerabilities predict overall anxiety reduction.

Main Methods:

• Participants received transdiagnostic group CBT.
• Measures of NA, AS, IU, and anxiety were assessed before and after treatment.
• Mediation analyses were conducted to examine the relationship between changes in mediators and anxiety reduction.

Main Results:

• NA, AS, and IU all significantly decreased over the course of transdiagnostic group CBT.
• Changes in NA were significantly associated with reductions in anxiety.
• Changes in AS and IU were not significantly related to anxiety reduction; no differential effects were observed across primary diagnoses.

Conclusions:

• Negative affectivity (NA) emerges as a key overarching mediator of anxiety reduction in transdiagnostic group CBT.
• While AS and IU also decrease, NA appears to be the primary driver of symptom improvement in this context.
• Findings support targeting NA in transdiagnostic CBT protocols for anxiety.