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Use of a Psychophysiological Script-driven Imagery Experiment to Study Trauma-related Dissociation in Borderline Personality Disorder

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Group schema therapy for cluster-C personality disorders: A multicentre open pilot study.

Carlijn J M Wibbelink¹, Anne-Sophie S M Venhuizen¹, Raoul P P P Grasman²

¹Department of Clinical Psychology, University of Amsterdam, Amsterdam, The Netherlands.

Clinical Psychology & Psychotherapy

|September 10, 2023

Summary

Group schema therapy (GST) shows significant improvements for Cluster-C personality disorders (PDs). This promising treatment warrants further investigation through randomized controlled trials for personality disorder patients.

Keywords:

avoidant, dependent and obsessive-compulsive personality disorders cluster-C personality disorders effectiveness group schema therapy pilot study

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Area of Science:

Psychiatry
Clinical Psychology
Psychotherapy Research

Background:

Group schema therapy (GST) is gaining traction for personality disorders (PDs), particularly Cluster-C PDs.
While individual schema therapy (ST) is effective for Cluster-C PD, evidence for GST is limited.
This study addresses the need to evaluate GST's effectiveness in Cluster-C PD patients.

Purpose of the Study:

To investigate the effectiveness of Group schema therapy (GST) for Cluster-C personality disorders (PDs).
To explore potential differences in treatment outcomes among specific Cluster-C PDs (avoidant, dependent, and obsessive-compulsive).

Main Methods:

A multicentre open trial involving 137 patients diagnosed with Cluster-C PDs.
Patients received 30 weekly GST sessions, with options for individual ST and booster sessions.
Outcomes including PD severity, psychopathology, quality of life, and schema-related variables were assessed over a 2-year follow-up using mixed regression analyses.

Main Results:

Significant improvements were observed across all Cluster-C PDs, with medium to large effect sizes at 2-year follow-up.
The treatment dropout rate was 11.7%.
Preliminary indications suggest potential differences between specific Cluster-C PDs in baseline severity, change trajectories, and GST effectiveness.

Conclusions:

Group schema therapy (GST) demonstrates promise as an effective treatment for Cluster-C personality disorders.
Further research, including a randomized controlled trial, is recommended to confirm the (cost-)effectiveness of GST.