Ein Selbstbeurteilungsinstrument zur Erfassung von Dermatillomanie: Reliabilität und Validität der deutschsprachigen Version der Skin Picking Scale-Revised

Abstract

At least since the introduction of the official diagnosis Excoriation (Skin-Picking) Disorder in the DSM-5 [1], dermatillomania is an important and growing field of research. Despite the high importance currently a huge lack of German assessment instruments exists. Aim of the present study was the examination of the psychometric properties of the German translation of the Skin Picking Scale-Revised [2]. For this purpose an open online study has been conducted. The analysis of N=2 065 data sets indicated a high internal consistency with Cronbachs Alpha being 0.93. Furthermore positive associations with the 3 problem areas psychological impairment, general physical condition, social problems as well as with reduced competence skills, general life satisfaction and social support indicate a good constructvalidity. Another sign for validity is a significant effect in terms of gender: As expected women showed higher skin picking scores than men. Overall the results of the present study suggest that the German version of the SPS-R can be seen as a reliable and valid instrument for the assessment of dermatillomania.

Visual symptom provocation in skin picking disorder: an fMRI study

“… The Questionnaire for the Assessment of Self-Disgust (QASD; Schienle et al 2014 ) has two subscales “Disgusting Self” (nine items; Guttman’s λ4 = 0.81) and “Disgusting Ways” (six items; Guttman’s λ4 = 0.81) which assess disgust-related self-concept (e.g., “I find myself repulsive”) and behavior (e.g., “I regret my behavior”). The Skin Picking Scale revised (SPS-R; Gallinat et al 2016 ) has two sub scales (4 items each) which describe “symptom severity” (Cronbach`s α = 0.96) and “impairment” (α = 0.95) by the picking during the last week. Each item is rated on 5-point scales (e.g., “How often to you feel the need to pluck or squeeze your skin?”).…”

“…The Skin Picking Scale revised (SPS-R; Gallinat et al 2016 ) has two sub scales (4 items each) which describe “symptom severity” (Cronbach`s α = 0.96) and “impairment” (α = 0.95) by the picking during the last week. Each item is rated on 5-point scales (e.g., “How often to you feel the need to pluck or squeeze your skin?”).…”

SaveMySkin: An Internet-based self-help intervention for skin picking. Study protocol for a randomized pilot study

“…The SPS-R consists of eight items assessing the two subscales, ‘symptom severity’ (frequency and intensity of the urge to pick, time spent on skin picking, control over the behavior) and ‘impairment’ (avoidance, interference and emotional distress due to skin picking, damage to skin caused by skin picking) in reference to the last week. The German translation of the SPS-R will be used in the present study [ 24 ].…”

Skin picking in patients with obesity: Associations with impulsiveness and self‐harm

“…No validated German instruments for the assessment of skin picking were available at the time the present study was conducted. The official, validated German translation of the Skin Picking Scale-Revised was published one year later (Gallinat, Keuthen & Backenstrass, 2016). Furthermore, skin picking occurrence could only be reported at item level due to the lack of a clinical cutoff score for the SPS-D_plus.…”