Reliability and validity of the Trichotillomania Dimensional Scale (TTM-D)

Cheyne, JE; del Pozo de Bolger, A; Wootton, BM

Reliability and validity of the Trichotillomania Dimensional Scale (TTM-D)

Cheyne, JE del Pozo de Bolger, A Wootton, BM

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Publication Type:: Journal Article
Citation:: Journal of Obsessive-Compulsive and Related Disorders, 2018, 19 pp. 61 - 65
Issue Date:: 2018-10-01

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Field	Value	Language
dc.contributor.author	Cheyne, JE	en_US
dc.contributor.author	del Pozo de Bolger, A	en_US
dc.contributor.author	Wootton, BM https://orcid.org/0000-0001-9036-0699	en_US
dc.date.issued	2018-10-01	en_US
dc.identifier.citation	Journal of Obsessive-Compulsive and Related Disorders, 2018, 19 pp. 61 - 65	en_US
dc.identifier.issn	2211-3649	en_US
dc.identifier.uri	http://hdl.handle.net/10453/128397
dc.description.abstract	© 2018 Elsevier Inc. 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.	en_US
dc.relation.ispartof	Journal of Obsessive-Compulsive and Related Disorders	en_US
dc.relation.isbasedon	10.1016/j.jocrd.2018.08.004	en_US
dc.title	Reliability and validity of the Trichotillomania Dimensional Scale (TTM-D)	en_US
dc.type	Journal Article
utslib.citation.volume	19	en_US
utslib.for	1701 Psychology	en_US
utslib.for	1103 Clinical Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Graduate School of Health
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	19	en_US

Abstract:

© 2018 Elsevier Inc. 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.

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http://hdl.handle.net/10453/128397