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Related Experiment Videos

The Skin Picking Impact Scale (SPIS): scale development and psychometric analyses.

N J Keuthen1, T Deckersbach, S Wilhelm

  • 1Department of Psychiatry, Massachusetts General Hospital and Harvard Medical School, Charlestown 02129-2060, USA. keuthen@psych.mgh.harvard.edu

Psychosomatics
|December 12, 2001
PubMed
Summary
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The Skin Picking Impact Scale (SPIS) effectively measures psychosocial distress from skin picking behaviors. A 10-item version shows good reliability and distinguishes between self-injurious and non-self-injurious skin picking.

Area of Science:

  • Psychiatry
  • Psychology
  • Dermatology

Background:

  • Repetitive skin picking is a significant behavior with psychosocial consequences.
  • Existing measures may not fully capture the impact of skin picking behaviors.

Purpose of the Study:

  • To develop and validate the Skin Picking Impact Scale (SPIS) for assessing psychosocial consequences.
  • To differentiate between self-injurious and non-self-injurious skin picking.

Main Methods:

  • Development of a 28-item scale, followed by item reduction based on difficulty and correlations.
  • Administration to 31 individuals with self-injurious skin picking and 78 with non-self-injurious skin picking.
  • Psychometric analyses including internal consistency, correlations, and receiver operating characteristic (ROC) analysis for cutoff determination.

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Main Results:

  • A 10-item SPIS demonstrated good internal consistency.
  • SPIS scores were significantly higher in individuals with self-injurious skin picking.
  • SPIS scores correlated with picking duration, satisfaction, shame, depression, and anxiety.
  • A cutoff score of 7 optimally discriminated between self-injurious and non-self-injurious skin picking.

Conclusions:

  • The 10-item SPIS is a reliable and valid instrument for assessing the psychosocial impact of skin picking.
  • The SPIS can effectively distinguish individuals with self-injurious skin picking.
  • The scale aids in understanding the distress associated with skin picking behaviors.