Daan Hulsmans

91 The feasibility of daily monitoring 4 al. (2019) showed that the implementation of EMA in care for psychiatric patients (without an intellectual disability) had several advantages for the clinicians, such as improved patient-clinician relationship, increased personalization and efficiency of care. Future research could explore how daily diaries are used in specialized practice for those with a mild intellectual disability and how acceptable the care professionals deem this method. A second limitation is the small sample size, especially in the juvenile detention center (n = 6). This makes it hard to explain why compliance there was so low (19.4%) and how it may be improved in future research. Findings by Pihet et al. (2017) suggest it is possible to implement EMA in a juvenile detention center. They found a 92% compliance rate in 52 incarcerated adolescents, that were given a special handheld computer to selfreport momentary experiences four times per day during 8 days. Given that the target group is overrepresented in the criminal justice system (Hellenbach et al., 2017), it is important that future research investigates the needs of juvenile justice institutions and incarcerated young people with mild intellectual disability or borderline intellectual functioning, in facilitating and accomplishing good compliance rates in daily diary research. There are several strengths to this study. Compared to daily diary protocols that take several days or weeks, our relatively long sampling period of 2 months is a strength. Psychological treatment trajectories typically take more than a month, which means the method is useful for clinical research and practice. The utility for clinical practice, and thereby the feasibility, was further enhanced by channeling the responses back to the care professionals and by offering participants the option to monitor self-selected items daily. This strategy adheres to a call for a personalized approach to psychopathology (Wright & Woods, 2020), but is relatively innovative in the realm of (daily diary) EMA research that typically employs surveys that are fully standardized across participants. Our findings introduce a new strategy to the field of intellectual disability research, but also contribute clinical research in general. 4.2 Practical and scientific implications Daily diaries benefitted participants—all of whom received care in specialized care settings. Although the concept of keeping diaries and discussing them in treatment sessions is not a new therapeutic technique for people with an intellectual disability (Surley & Dagnan, 2018), this is typically done with penand-paper diaries because of electronic diaries raised feasibility concerns (e.g., Illingworth et al., 2015). Youth typically have their mobile phone with them, which makes completing a diary entry preferable over the pen-and-paper approach. The majority of participants (64%) reported improved self-awareness due to the

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