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Background An open group climate is essential in successful residential care for juveniles with mild intellectual disability (MID). This study examined whether non‐violent resistance, adapted for MID (NVR‐MID), stimulates an open group climate in time. Method NVR‐MID was implemented in three residential settings in The Netherlands, in a quasi‐experimental stepped wedge design. In total, 124 clients with MID (Mage = 16.39 [SD = 4.95], 49.9% male) participated. Group climate was assessed seven times with the Group Climate Inventory for Children or the Group Climate Inventory‐Revisited (GCI‐R), during a total of 20 months. Results Open group climate scores increased in all three institutions; effect size was medium. Clients with lower IQs experienced group climate as more positive compared to clients with higher IQs. Effects were similar for both groups. Conclusions As NVR‐MID appeared to contribute to a positive experienced group climate, it might be advisable to implement NVR‐MID on larger scale.

Background Monitoring the implementation of new interventions, as in this study Nonviolent Resistance (NVR) for the use in residential youth care settings, is mandatory in order to evaluate, adjust and refine the implementation process where necessary. Objective As there is no instrument for such monitoring of NVR available, the authors developed a new questionnaire, named Reaction to Unacceptable Behavior Inventory, (in short: RUBI). Method This questionnaire was completed by staff of four different residential settings in the Netherlands, at different stages of the NVR implementation process. The staff members reported on the practice of their colleagues. Results The results are promising, as they show good reliability, inter-item correlations and other psychometric features for the included items. Furthermore, the results show that the RUBI seems to discriminate between trained and untrained teams, defending its use in future implementation processes and implementation research. Conclusions The RUBI is the first attempt to create an instrument which can be used for monitoring change during implementation of NVR, and for evaluating the degree of difference or compatibility between NVR and existing practice before implementation. Longitudinal research is needed to strengthen the documentation of validity and reliability of the RUBI in different settings, countries, and cultures. This should also be extended to the final and follow-up stages of implementation. In the future, redundant and insensitive items should be removed and standards for interpreting scale scores should be developed. Keywords Residential youth settings • Questionnaire development • Implementation fidelity • Coping with aggressive behavior K. M. Visser and K. van Gink have shared first authorship.

Background Levels of aggression are high in residential settings for juveniles with Mild Intellectual Disability (MID). As a result, treatment is less effective, aggression causes injury, traumatic experiences and longer inhabitation for juveniles. Additionally, inpatient aggression has been linked to burnout and stress among group workers, which has negative consequences such as less job satisfaction or poorer work performance Objective Therefore, it is crucial to diminish aggressive incidents in these settings and to find a way for staff how to respond to aggression properly. Methods As there is no intervention method which tackles all of the referred problems efficiently, a new method Non-violent Resistance for MID was introduced into three residential settings for juveniles with MID, in a quasi-experimental stepped wedge design. Reports of aggressive incidents were assessed seven times before, during and after the training in NVR-MID on group level. Multilevel analyses were carried out in order to assess the development of the aggressive incidents over time. Results Aggressive incidents decreased significantly in time during and after training in NVR-MID, this decrease is seen in all three institutions. Thus, regardless of resident’s age, gender or IQ, NVR-MID seemed successful in diminishing aggressive incidents. Furthermore, a significant interaction effect was found between institution and time, indicating that regardless if incidents of aggression were relatively high at baseline, decrease in incidents was similar to institutions where incidents were relatively low on baseline. Conclusions Implementing NVR-MID into residential settings for juveniles with MID and comorbid behavioral problems might help to decrease aggressive incidents.