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86. A Validation Study of the Community Assessment of Psychic Experience Scale (CAPE) in a Borderline Personality Disorder Outpatient Sample
Psychotic features (i.e., hallucinations, paranoia, delusions) are common in Borderline Personality Disorder (BPD) and are associated with more severe psychopathology and greater need for treatment and monitoring. Well-validated assessment tools of psychotic features in this sample are non-existent, thereby hindering detection of BPD individuals who require greater clinical attention. This study aimed to examine the psychometric properties of an extensively used measure of psychotic-like experiences – the Community Assessment of Psychic Experiences (CAPE) – in a sample of 41 BPD outpatients. A confirmatory factor analysis suggested that the scale responses had poor fit with the purported tridimensional model of psychotic symptomatology: positive, negative, and depressive symptoms. Exploratory principal components analysis revealed three reliable domains: “Bizarre ideation”, “Paranoia/Persecutory ideation”, and “Anhedonia/Avolition”. Divergent validity of these domains was minimally supported; Most differential symptom measures shared moderate-large correlations with all three domains (i.e., borderline symptoms: r’s = .42 - .67; anxiety: r’s = .44 - .53), except for depression, which weakly correlated with “Bizarre ideation” and “Paranoia/Persecutory ideation” (r’s = .20 - .26) and strongly correlated with “Anhedonia/Avolition”. These preliminary results highlight the need to carefully revise CAPE items to promote reliable and valid measurement of psychotic symptom domains that are intrinsic to BPD.