The assessment of skin picking in adolescence: psychometric properties of the Skin Picking Scale-Revised (German version)

Background: Skin picking disorder has received growing attention since the release of DSM-5, yet there are no evidence-based assessment instruments for adolescent samples.Aim: The present study examines the psychometric properties of the Skin Picking Scale-Revised (SPS-R, German version) in adolescents.Methods: A total of 76 adolescents (96% female) completed the SPS-R, the Clinical Psychological Diagnostic System (KPD-38), and a questionnaire assessing demographics and clinical characteristics online.Results: The SPS-R had high internal consistency (=0.89) and significant small-to-medium correlations with reduced competence skills, psychological impairment, general life satisfaction, social support, and social problems on the KPD-38. Similar to prior findings for adults, an exploratory factor analysis suggested a two-factor model for the SPS-R in adolescents. Group comparisons failed to show significant differences on SPS-R scores between participants with and without dermatological conditions.Conclusions: The current results suggest that the SPS-R can be useful in adolescent samples as a reliable and valid instrument for the assessment of skin picking severity. Future research investigating scale validity and factor structure in a clinical sample of adolescent skin pickers is warranted.