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Development and validation of the Gestalt Therapy Fidelity Scale
Madeleine Fogarty1, Sunil Bhar1, Stephen Theiler1
1Department of Psychological Sciences, Swinburne University of Technology, Hawthorn, VIC, Australia.
Summary
The Gestalt Therapy Fidelity Scale (GTFS) effectively measures adherence to Gestalt Therapy (GT). This psychometrically sound tool helps assess how accurately therapists implement GT principles.
Area of Science:
- Psychology
- Psychotherapy Research
Background:
- Gestalt Therapy (GT) is a distinct therapeutic approach.
- Assessing treatment fidelity is crucial for research and clinical practice.
Purpose of the Study:
- To develop and validate the Gestalt Therapy Fidelity Scale (GTFS).
- To create a reliable measure for assessing adherence to Gestalt Therapy.
Main Methods:
- A multi-study approach involving literature review, Delphi methodology with 63 experts, expert review of 6 sessions, and validation with 176 participants rating 18 countries' sessions.
- Item generation based on literature, expert consensus for item selection, and usability feedback.
- Validation involved rating Gestalt Therapy and non-Gestalt Therapy sessions to assess discriminative validity.
Main Results:
- The Delphi method yielded 25 initial items, refined through expert feedback.
- The Gestalt Therapy Fidelity Scale (GTFS) demonstrated significant ability to differentiate between GT and non-GT sessions.
- High internal consistency and inter-rater reliability were achieved for the GTFS.
Conclusions:
- The Gestalt Therapy Fidelity Scale (GTFS) is a psychometrically validated instrument.
- The GTFS can reliably assess the fidelity of Gestalt Therapy administration.
- This scale supports rigorous evaluation of Gestalt Therapy research and practice.
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