The main aim of the project is to investigate the effectiveness and change mechanisms of Mentalization Based Therapy for Children (MBT-C; Midgley et al., 2017). MBT-C is a transdiagnostic treatment for children aged between 5 to 12 years old with the main aim of increasing mentalization and restoring epistemic trust. Parallel parental work takes place to increase parental mentalization. This project will test the effectiveness of MBT-C in a parallel group single blind pragmatic Randomized Controlled Trial (pRCT) conducted in Turkey in comparison to a parenting and social skills group. The sample will include 240 children between 5-12 years old with internalizing and externalizing and comorbid internalizing/externalizing problems and their parents. During the study, the patients will be randomized to two arms, and the treatment's effectiveness will be investigated both at short (8th and 12th weeks) and long terms (24th and 36th week) to also assess relapse prevention. Thelarge sample size and the longitudinal evaluation of primary (decrease in problems), and secondary outcomes will enable the investigation of mediators and moderators. This project will also undertake a rigorous psychotherapy process study within the RCT, examining for the first time, for which children and under what circumstances MBT-C may be most effective, meaningfully linking process with outcome. For this purpose, patients' baseline characteristics, especially attachment security and mentalization deficits that may interact with treatment outcome (moderators) and different dimensions of mentalization that develop over the course of the treatment (change mechanisms/mediators) will be assessed.
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Change from Baseline to 36th week on the Child Behavior Checklist (CBCL)
Timeframe: Baseline (T0), 8th week (T1), 12th week (T2), 24th week (T3), 36th week (T4)