First Validation of the Referential Process Post-session Scale – Therapist version (RPPS-T).

Objective: Bucci’s multiple code theory maintains that for a significant change the patient-therapist relationship should foster a referential process shaping in three alternating phases: arousal of emotion schemas, symbolizing/narrating emotional experiences, and reflecting/reorganizing the emotional meanings. Until now to monitor these phases clinicians and researchers have used several referential process computerized linguistic measures, which however need the sessions verbatim transcription. In order to have a less time-consuming method we developed and tested a therapist self-report questionnaire measuring the referential process phases. Method: We asked eight psychotherapists in a first study and nine psychotherapists in a second study to complete the Referential Process Post-session Scale – Therapist version (RPPS-T) just after the end of their sessions. In a third study we transcribed 29 sessions conducted by three psychotherapists to calculate the correlations between the RPPS-T scores and the computerized linguistic measures of the referential process calculated on the session transcripts. Results: In the first study we collected 105 evaluations regarding 29 patients and an exploratory factor analysis revealed a four-factor pattern consistent with the hypothesized constructs. The analysis reduced the initial pool of 42 items to 12. In the second study 130 sessions with 25 different patients have been evaluated on the shortened version of the RPPS-T and a confirmatory factor analysis found that the fourfactor model satisfactorily fitted the new data as well. In the third study we found that the factors of RPPS-T regarding the symbolizing phase correlated with the corresponding computerized linguistic measures calculated on the session transcripts. Conclusions: The RPPS-T received a first validation as a concurrent measure of the referential process, especially for the symbolizing phase, and could be considered a useful instrument for research and supervision.