Reid, Jordan; (2021) The relationship between schemata and psychotic symptoms in adult survivors of developmental trauma: A mixed methods study. Doctoral thesis (D.Clin.Psy), UCL (University College London).

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Abstract

BACKGROUND: Many people with psychotic symptoms have survived psychological trauma and psychological trauma is an established risk factor for psychosis. Trauma-focused psychotherapy (TPFT) has been suggested as a potential treatment for reducing psychotic symptoms. AIMS: To investigate the effectiveness, tolerability, and acceptability of TFPT for psychotic symptoms. METHOD: A systematic review was conducted, including studies of any form of psychotherapy that identified as trauma-focused and measured psychotic symptom as an outcome across a broad range of diagnoses. RESULTS: From 2584 papers initially identified, 17 studies of 857 participants met eligibility criteria. The best evidence for effectiveness is in support of exposure-based therapies, and the targeting of memories of trauma that appear linked to the psychotic symptoms. TFPT were found to be well tolerated, with very few adverse events. However, only four controlled trials were identified, and risk of bias was high across studies as a whole. CONCLUSIONS: There is preliminary evidence that TFPT using exposure is effective and well tolerated. Methodologically rigorous trials testing the efficacy of TFPT for the treatment of psychotic symptoms are needed for appropriate assessment of this promising intervention.

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