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Disentangling the Therapist Effect: Clustering Therapists by Using Different Treatment Outcomes.
Pauline Janse1, Naline Geurtzen2, Agathe Scappini3
1Pro Persona Research, Wolfheze, The Netherlands. p.janse@propersona.nl.
Administration and Policy in Mental Health
|March 21, 2024
Summary
Therapist effects vary across different mental health treatment outcomes. This study identified four distinct therapist profiles, highlighting the need for personalized treatment approaches.
Area of Science:
- Psychology
- Mental Health Services Research
- Clinical Psychology
Background:
- Therapist effects, or variations in therapist performance, are well-documented.
- Therapists effective in one outcome may not be in others, necessitating nuanced assessment.
Purpose of the Study:
- To investigate therapist effects across multiple treatment outcomes.
- To identify distinct therapist performance profiles.
- To explore therapist characteristics associated with performance clusters.
Main Methods:
- Observational naturalistic study with 68 therapists and 5,582 clients.
- Multilevel analyses for OQ-45 change, dropout, referrals, duration, and satisfaction.
- Hierarchical cluster analysis to group therapists by performance.
Main Results:
- Therapist effects varied by outcome, from 2.6% (OQ-45 change) to 6.5% (sessions).
- Four distinct therapist clusters emerged with varied performance profiles.
- Differences in therapist characteristics were observed across clusters.
Conclusions:
- Therapists exhibit diverse performance profiles across treatment outcomes.
- Findings support personalized treatment strategies.
- Informs future research on effective therapist characteristics.
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