59 Behavioral problems in Take it Personal! 3 treatment center. Participants were screened at baseline and three months after Take it Personal!, for which they were complemented with a €5 gift card per measurement. All participants were still in treatment at the followup screening. Further information on enrolment, allocation and follow-up is visualized in Figure 1. Data was collected between January 2015 and April 2017. This research was approved by the Ethical Committee Social Sciences of Radboud University (ECSW2015-0903-303). 2.2 Measures 2.2.1 Personality risk A Dutch version of the Substance Use Risk Profile Scale (SURPS; Woicik et al., 2009), adapted for individuals with a mild intellectual disability (Poelen et al., 2017), was administered at baseline to distinguish the four high-risk personality profiles for substance use. This 23-item questionnaire contained seven items that measure NT, six items for SS, five items for IMP and five items for AS. Each item could be scored on a 4-point Likert scale that ranged between (1) ‘strongly agree’ and (4) ‘strongly disagree’. To adapt the SURPS to adolescents and young adults with a mild intellectual disability, simple wording and pictorial stimuli were used. This adapted version of the SURPS had previously demonstrated reliability and validity in people with a mild intellectual disability (Pieterse et al., 2020; Poelen et al., 2017). The SURPS had an acceptable internal consistency with Cronbach’s α = 0.71 for AS, 0.87 for NT, 0.62 for IMP and 0.67 for SS in this sample.
RkJQdWJsaXNoZXIy MTk4NDMw