Objective: Improvement in patients' mentalizing capacities is considered a possible mechanism of change in psychotherapy. This improvement might take place via mentalization-enhancing interventions (MEIs) performed by psychotherapists. The study aimed to explore the use of MEIs in two evidence-based psychotherapeutic treatments for patients with anorexia nervosa (enhanced cognitive-behavior therapy, focal psychodynamic therapy) and their association with the patients' capacity to mentalize in sessions ("in-session reflective functioning" / in-session RF). Additionally, it was explored, if the amount of MEIs used could either predict change in in-session RF or outcome (end of treatment, one year follow-up).
Method: 84 audiotapes from psychotherapy sessions of 28 patients of the ANTOP-study (three sessions per patient) were transcribed and rated with both the MEI Rating Scale and the In-Session RF Scale by trained raters.
Results: MEIs were applied in both treatments. A moderate correlation between the amount of MEIs and patients' in-session RF as well as its change over the course of treatment was found, but no relation to change in BMI or eating disorder symptoms.
Conclusion: A greater use of MEIs was related to patients' in-session-mentalizing. However, there seems to be no simple relation between RF as shown in sessions and symptom change.
Keywords: anorexia nervosa; eating disorders; mentalization; outcome; psychotherapy; reflective functioning.