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An Italian validation of the Comparative Psychotherapy Process Scale: Reliability and validity
Daniela Gentile1, Antonello Colli2, Vittorio Lingiardi1
1Department of Dynamic and Clinical Psychology, Sapienza University of Rome, Rome, Italy.
Clinical Psychology & Psychotherapy
|April 21, 2020
Summary
The Comparative Psychotherapy Process Scale (CPPS) effectively measures psychodynamic-interpersonal and cognitive-behavioural therapy techniques. This study confirms the CPPS as a valid and reliable tool for evaluating therapist interventions.
Area of Science:
- Psychology
- Psychotherapy Research
Background:
- The Comparative Psychotherapy Process Scale (CPPS) assesses therapist interventions.
- It features psychodynamic-interpersonal (PI) and cognitive-behavioural (CB) subscales.
Purpose of the Study:
- To evaluate the psychometric properties of the CPPS.
- To compare CPPS subscales against established psychotherapy prototypes (PQS).
Main Methods:
- 94 psychotherapy sessions (psychodynamic and cognitive-behavioural) were analyzed.
- Two independent rater groups assessed sessions with high interrater reliability (ICC = .78).
Main Results:
- The CPPS demonstrated strong psychometric properties.
- The PI and CB subscales showed validity when compared to PQS prototypes.
Conclusions:
- The CPPS is a valid and reliable instrument for assessing therapist techniques.
- It offers a clinically sensitive and psychometrically robust evaluation.
- Findings support the CPPS's utility in clinical and research settings.
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