ArticleBorderline personality disorder and emotion dysregulation2026
Mentalizing on the edge: borderline traits and their association with real-time self-reflection - an ecological momentary assessment study.
Article in Borderline personality disorder and emotion dysregulation, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundMentalization plays a key role in borderline personality disorder (BPD), yet its moment-to-moment fluctuations remain understudied. This study is the first to use established self-report items within an Ecological Momentary Assessment (EMA) to explore the links between aspects of mentalizing in daily life and BPD traits in a community sample.
methodsThe non-clinical sample consisted of 86 participants (86% female) aged between 18 and 51 years (M = 22.93, SD = 5.36). As part of a baseline survey in the laboratory, the participants completed self-report questionnaires to assess borderline accentuation and mentalizing in the form of subjective certainty regarding their own and others' mental states (self-certainty and other-certainty). In addition, in a subsequent one-week EMA, they reported momentary self-certainty and other-certainty at six randomized times during the day.
resultsUsing multiple regression (enter method), self-certainty proved to be a negative predictor of borderline accentuation, with intraindividual variations correlating positively with borderline personality style. Contrary to expectations, however, neither the level of other-certainty in the EMA nor the corresponding intraindividual fluctuations were related to borderline accentuation.
conclusionFuture studies should consider the high intraindividual variability of self- and other-certainty in order to obtain ecologically valid insights into mentalizing processes in the context of BPD. Promoting self-certainty may be a valuable target in BPD treatment. However, other-certainty might not be as important.
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