Abstract
Although ecological momentary assessment (EMA) provides an opportunity for the examination of intervention mechanisms in real time, there are few validated tools to assess key treatment mechanisms in EMA studies. Our focus in this study is a potentially critical treatment mechanism, improvement in self-efficacy for managing negative emotions. We examined the psychometric properties of the Patient-Reported Outcomes Measurement Information System (PROMIS) self-efficacy for managing negative emotions scale measured via EMA. Participants (n = 145 college students) in a clinical trial of Dialectical Behavior Therapy skills completed four daily EMAs for 6 weeks (13,153 total responses). Results indicated (a) excellent internal consistency and good factor structure, (b) sufficient variability at both the between- and the within-persons levels, and (c) strong construct and predictive validity. This study supports the validity of an EMA measure of self-efficacy for managing negative emotions that can be used in real time, both in intervention studies and in observational research.
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