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Title: Reliability and validity of the Trichotillomania Dimensional Scale (TTM-D)
Contributor(s): Cheyne, Jacqueline E (author); del Pozo de Bolger, Andrea (author)orcid ; Wootton, Bethany M (author)
Publication Date: 2018-10-01
DOI: 10.1016/j.jocrd.2018.08.004
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Abstract: Trichotillomania (TTM) is characterized by repetitive hair pulling resulting in hair loss. The Trichotillomania Dimensional Scale (TTM-D) is a newly developed DSM-5 scale that aims to assess the symptoms of TTM dimensionally. The aim of this current study was to examine the psychometric properties of the TTM-D in a sample of 483 participants. Principal Component Analysis indicated a single factor structure of the TTM-D. Internal consistency and test retest reliability was high (α = 0.89 and r = 0.91 respectively). The TTM-D demonstrated excellent convergent validity with the Massachusetts General Hospital Hair Pulling Scale (MGH-HPS; rs = 0.90) and divergent validity with the Depression Anxiety and Stress Scale (DASS-21; rs = 0.45). Further, the TTM-D demonstrated equivalence between online and pen-and-paper administrations (rs = 0.93). The findings suggest that the psychometric properties of TTM-D are sound and well supported within a community sample.
Publication Type: Journal Article
Source of Publication: Journal of Obsessive-Compulsive and Related Disorders, v.19, p. 61-65
Publisher: Elsevier BV
Place of Publication: The Netherlands
ISSN: 2211-3649
Field of Research (FOR): 170106 Health, Clinical and Counselling Psychology
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article

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