Psychometric properties of the excoriation (skin-picking disorder) dimensional scale

Publication Type:
Journal Article
Clinical Psychologist, 2020, 24, (3), pp. 246-253
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Objective: The Excoriation (skin-picking disorder) dimensional scale (SPD-D) is a new measure of excoriation skin picking disorder (SPD). The 5-item scale was developed by the Diagnostic and Statistical Manual (Fifth Edition) obsessive–compulsive spectrum disorders sub-workgroup to assist in the dimensional assessment of SPD. Method: The aim of the present study was to provide a psychometric evaluation of this new scale in a large community sample. 803 participants were recruited from online community noticeboards around Australia. Results: The results indicated that the SPD-D demonstrated a unidimensional structure, high internal consistency (r =.87,.86, and.92 across three samples), and good test–retest reliability (r =.86). The SPD-D also demonstrated good convergent validity with the Skin-Picking Scale Revised (r =.90) as well as divergent validity with the generalised anxiety disorder scale (r =.40). Conclusions: Overall, the SPD-D appears to be a brief and reliable measure of SPD symptomatology. s s s s
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