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Clinical Psychologist Volume 24, 2020 - Issue 3
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Original Article

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

Angela RussellSchool of Behavioural, Cognitive and Social Sciences, University of New England, Armidale, New South Wales, Australia,
,
Andrea Pozo de bolgerSchool of Behavioural, Cognitive and Social Sciences, University of New England, Armidale, New South Wales, Australia,
,
Karen MosesSchool of Social Sciences and Psychology, Western Sydney University, Penrith, New South Wales, Australia,
,
Aileen LuoDiscipline of Psychology, Graduate School of Health, University of Technology Sydney, Ultimo, New South Wales, Australia,
&
Bethany M. WoottonSchool of Behavioural, Cognitive and Social Sciences, University of New England, Armidale, New South Wales, Australia, ;Discipline of Psychology, Graduate School of Health, University of Technology Sydney, Ultimo, New South Wales, Australia, Correspondence[email protected]
Pages 246-253 | Received 08 Apr 2019, Accepted 12 Dec 2019, Published online: 11 Mar 2021
 
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Abstract

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 (rs = .87, .86, and .92 across three samples), and good test–retest reliability (rs = .86). The SPD‐D also demonstrated good convergent validity with the Skin‐Picking Scale Revised (rs = .90) as well as divergent validity with the generalised anxiety disorder scale (rs = .40).

Conclusions

Overall, the SPD‐D appears to be a brief and reliable measure of SPD symptomatology.

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