Research Article
How to Define, Find and Classify Side Effects in Psychotherapy: From Unwanted Events to Adverse Treatment Reactions
Article first published online: 18 JAN 2012
DOI: 10.1002/cpp.1765
Copyright © 2012 John Wiley & Sons, Ltd.
Issue

Clinical Psychology & Psychotherapy
Early View (Online Version of Record published before inclusion in an issue)
Additional Information
How to Cite
Linden, M. (2012), How to Define, Find and Classify Side Effects in Psychotherapy: From Unwanted Events to Adverse Treatment Reactions. Clin. Psychol. Psychother.. doi: 10.1002/cpp.1765
Publication History
- Article first published online: 18 JAN 2012
- Manuscript Revised: 10 DEC 2011
- Manuscript Accepted: 10 DEC 2011
- Manuscript Received: 7 MAY 2011
- Abstract
- Article
- References
- Cited By
Keywords:
- psychotherapy;
- unwanted events;
- side effects;
- adverse treatment reactions;
- malpractice;
- quality assurance
Objective
Empirical research on the negative effects of psychotherapy is insufficient, partly because there is a lack of theoretical concept on how to define, classify and assess psychotherapy side effects. This paper proposes a model for the definition, classification and assessment of psychotherapy side effects.
Method
Definitions are provided for ‘unwanted events’, ‘treatment-emergent reactions’, ‘adverse treatment reactions’, ‘malpractice reactions’, ‘treatment non-response’, ‘deterioration of illness’, ‘therapeutic risks’ and ‘contraindications’. We describe processes analysing the causality of negative events and the correctness of treatment.
Result
A procedural model on how to find, classify and evaluate negative events is described, the unwanted event to adverse treatment reaction (UE–ATR) checklist.
Conclusion
Recognition of adverse treatment effects is a characteristic of good therapists and treatments. Psychotherapists should be sensitive for negative effects. This can help improve the quality of treatment. The UE–ATR checklist can be used in psychotherapy trials, quality assurance, clinical practice and training of psychotherapists.Copyright © 2012 John Wiley & Sons, Ltd.
Key Practitioner Message
- If you do not find adverse treatment effects, then ask yourself why and do not assume that there are no side effects.
- The detection and management of adverse treatment effects is not a sign of bad but of good clinical practice.

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