86 Chapter 3 and the availability of family support. The SCIL demonstrated adequate sensitivity and specificity (Kaal et al., 2015). Cognitive distortions Cognitive distortions will be measured at baseline with the Dutch version of the How I Think Questionnaire (HIT-Q), a 54-item 6-point Likert-type self-report questionnaire (Barriga & Gibbs, 1996; Barriga, Morrison, Liau, & Gibbs, 2001; Brugman et al., 2011). Of these items, 39 can be clustered into four categories of self-serving cognitive distortions: (1) self-centeredness, (2) blaming others, (3) minimizing/mislabeling, and (4) assuming the worst. All beforementioned 39 items are matched to one of the four antisocial behavioral categories of the DSM-IV-TR: (1) opposition-defiance, (2) physical aggression, (3) lying, and (4) stealing. Furthermore, other items consist of anomalous-responding items (8 items) and positive fillers (7 items). The Dutch HIT-Q demonstrated good psychometric properties in terms of reliability as well as convergent and divergent validity (Gini & Pozzoli, 2013; Nas, Brugman, & Koops, 2008). Program integrity In order to assess whether the intervention is implemented as intended and in accordance with protocols, program integrity is measured with a self-developed questionnaire. The instrument consists of questions about general characteristics of coaches, program evaluation and an estimation of patients’ adherence or motivation. Researchers will fill out the questionnaires together with coaches at the end of the intervention (12 months after baseline). Other variables of interest A qualitative interview of experiences will be obtained with self-developed topic lists (Boeije, 2005) to evaluate experiences of both participants and network coaches during coaching. Ethical and safety reporting All adverse events (AE; e.g., undesirable events that occur to a subject during the study) and serious adverse events (SAE; e.g., life-threateningmedical events resulting in significant disabilities, hospitalization, or death) will be documented by the researchers. The principle investigator and ethics committee will be informed when a SAE occurs.
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