Development of a new observer-rated measure to assess the real relationship in psychotherapy sessions.

Objectives: Real relationship (RR) refers to a genuine human relationship between client and therapist, that has been found to be positively related to treatment outcome, and to predict unique variance in outcome over and above the working alliance. However, thus far, the measurement of RR has been limited to self-report. We aimed to develop an observer-rated version of the RR measure (RR-O) to assess RR in therapy sessions.

Methods: We adapted items from the self-report measures to an observer rated measure, which was reviewed by RR experts. The final 24-item RR-O was rated in 540 session transcripts from 27 psychoanalytic treatments that already had existing process and outcome scores.

Results: The RR-O showed good internal consistency and good interrater reliability. In hierarchical EFA, items clustered into a general RR factor, and client realism, client genuineness, therapist genuineness, and therapist realism group factors. In addition, the RR-O was positively related to another RR measure and to the therapeutic alliance.

Conclusion: The RR-O shows initial reliability and validity as an observer-rated measure of the RR to be used in post-hoc psychotherapy research. Future research should clarify the relation between RR-O and treatment outcome.