105 Idiographic personality networks 5 fitting protocol targets the personality dimension on which the participant scores highest (i.e., highest z-score). In practice, this protocol is typically referred to as the participant’s profile (e.g., John receives intervention for personality profile “Impulsivity”). As such, we similarly administered the SURPS – translated in simplified Dutch wording and with added pictorial stimuli (Poelen et al., 2017) – at intake. This adapted version of the SURPS has demonstrated reliability and validity in people with a mild intellectual disability or borderline intellectual functioning (Pieterse et al., 2020; Poelen et al., 2017). The SURPS consists of four personality dimensions: anxiety sensitivity, negative thinking, impulsivity, and sensation seeking. The questionnaire includes 23 items – seven measuring negative thinking, six for sensation seeking, five for impulsivity and five for anxiety sensitivity. A 4-point Likert scale ranging between (0) ‘strongly disagree’ and (3) ‘strongly agree’ was used to score each item. 2.2.2 Daily diaries During the intake, the researcher helped the participant to install the app Ethica (Ethica, 2023) on their mobile phone. Through Ethica, surveys were promoted once per day for 60 consecutive days. All participants received this prompt in the evening. The exact evening time was tailored to each participant’s convenience, but did not change within individuals throughout the 60 days, ensuring equidistant time intervals within-persons. For example, some participants' diaries prompted at 8:00 PM each day and for some this was at 9:30 PM. All surveys included eight items that the participants self-rated daily. The choice of diary items was guided by both theory about personality network components and appropriateness for EMA. Cramer et al. (2012) suggest items from personality-trait inventories are the best starting points for components of the personality system. We therefore chose two items per construct of the Dutch version of the SURPS (Poelen et al., 2017; Woicik et al., 2009) that were also most pragmatic to answer on a daily basis. That is, items that had the potential to fluctuate between days. “Did you feel happy?” (reverse coded) and “Did you worry about your future?” were indicative of the day’s negative thinking. Daily anxiety sensitivity was measured with the items “Did you feel fearful?” and “Did you feel nervous?”. “Did you do things that you later regretted?” and “Did you do things without thinking?” reflected daily impulsivity. “Did you do things purely for kicks?” reflected sensation seeking of that day. The seven aforementioned items were derived from the SURPS. Because other sensation seeking items of the SURPS were deemed not appropriate to measure daily in this target group, the last (sensation seeking) diary item “Did you feel restless today?” was derived from the Brief Sensation Seeking Scale (van Dongen et al., 2021). All eight items were self-rated on a slider with five answer options,
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