How specific is cognitive change? A randomized controlled trial comparing brief cognitive and mindfulness...

Area of Science:

• Psychology
• Psychotherapy Research
• Clinical Psychology

Background:

• A central debate in psychotherapy research concerns whether specific therapeutic interventions utilize distinct mechanisms of change.
• It remains contested whether cognitive alterations are exclusive to cognitive therapies.

Purpose of the Study:

• To investigate if cognitive change is a specific mechanism exclusive to cognitive therapy.
• To compare a brief cognitive intervention with a brief mindfulness-based intervention using rigorous methodological standards.

Main Methods:

• Randomized controlled trial with 72 currently depressed outpatients assigned to cognitive intervention (n=39) or mindfulness-based intervention (n=33).
• Assessment of automatic thoughts, dysfunctional attitudes, and depressive symptoms before and six times during treatment.
• Multilevel structural equation modeling used to analyze within-person and between-person mediation effects.

Main Results:

• No significant differences in cognitive change were observed between the cognitive and mindfulness interventions.
• Negative self-statements and performance evaluations mediated the within-person effect of time on depressive symptoms.
• Depressive symptom reduction also mediated within-person cognitive changes, indicating a bidirectional relationship.

Conclusions:

• Cognitive change appears to be a general mechanism of change in psychotherapy, not specific to cognitive therapy.
• The mutual influence between cognitive and depressive symptom changes challenges a unidirectional causal model.
• Findings suggest that cognitive and emotional changes are interconnected and mutually reinforcing during therapy.