Comparative Psychotherapy Process Scale (CPPS): analysis of the validity and reliability of the Spanish adaptation / Escala Comparativa del Proceso Psicoterapéutico (CPPS): análisis de la validez y confiabilidad de su adaptación al castellano

Abstract

The study of psychotherapeutic interventions and their link with process and outcome variables has become a popular topic of great interest in psychotherapy research. This paper presents the adaptation into Spanish of the Comparative Psychotherapy Process Scale (CPPS), a 20-item scale that measures the degree to which therapists use Cognitive-Behavioural or Psychoanalytic-Interpersonal interventions. A hundred and one therapists (50 cognitive-behavioural and 51 psychoanalytic) completed the CPPS for the last patient they had treated. In a second sample of 15 patient-therapist dyads, both participants completed the CPPS regarding the same session. The subsequent analyses showed preliminary evidence of reliability (internal consistency and homogeneity) and validity (of construct and criterion) in the adaptation of the CPPS to Spanish. The implications of having a scale of these characteristics in Spanish and future lines of research are discussed.