RESUMEN
OBJECTIVES: The focus of the present research is to investigate the impact of therapist responsiveness at the very first session of therapy on the evaluation of therapeutic alliance from the therapist's perspective and from patient's perspective in the context of guideline-based treatment for borderline personality disorder. DESIGN: The study has a correlational and longitudinal design applied to a 10-session therapy in a naturalistic setting. METHODS: A total of four trained raters evaluated therapist responsiveness during the first session of therapy. After each therapy session, therapists and patients filled out the short form of the Working Alliance Inventory measuring working alliance; the sample included 13 therapists and 47 patients. Correlational analysis as well as hierarchical linear modelling exploring the relationship between first session therapist responsiveness and working alliance were performed. RESULTS: The global evaluation of responsiveness revealed a significant relationship with the temporal evolution of the alliance rated from the therapists' perspective. DISCUSSION: There is the necessity to further explore therapist appropriate responsiveness which could potentially explain several psychotherapy research results. Moreover, it could help in finding alternatives in order to facilitate patients' early engagement in therapy as well as facilitating the building process of therapeutic alliance. Finally, an effort should be made in order to study more individualized operationalization of responsiveness.