| Summary: | Research indicates that Multisystemic Therapy (MST) is an effective intervention for young people presenting with antisocial and offending behaviour (Henggeler & Sheidow, 2011). A model has been developed to explain the process of change in MST, however, little is known about which aspects of the intervention contribute to these change processes and how this ultimately links with outcomes. Research has explored the processes of change in more detail with young people and their families up to two months post MST (Tighe, Pistrang, Casdagli, Baruch, & Butler, 2012). As such, there is limited knowledge regarding factors contributing to sustained positive outcomes at long-term follow-up. The study employed a qualitative design, using grounded theory methodology (Charmaz, 2006; Glaser & Strauss, 1967) to explore young people's experiences of MST and what they perceived as helpful in sustaining positive outcomes over the long-term. The aim was to develop a detailed theoretical model of sustained change for young people following participation in MST, and to explore whether the existing model of the process of change in MST adequately explains this process for young people. Eight young people who had achieved positive outcomes upon completion of MST were interviewed between five to 21 months following MST. Data analysis led to the development of a model of sustained change in MST, incorporating theoretical codes including: the therapeutic alliance, increases in systemic awareness, recognising responsibility, positive peer relationships, acknowledging and celebrating success, the continued use of strategies and the identification and creation of a preferred future. 3 ~ •... -------------------------- This research provides detailed information on the process of change and how c is sustained from young people's perspectives, highlighting relevant developmental, individual and systemic factors in relation to this. This will be discussed in relation to clinical implications and developments needed to the general model of change in MST.
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