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17-02-2016

Photographic Assessment of Change in Trichotillomania: Psychometric Properties and Variables Influencing Interpretation

Auteurs: David C. Houghton, Maddison R. Franklin, Michael P. Twohig, Martin E. Franklin, Scott N. Compton, Angela M. Neal-Barnett, Stephen M. Saunders, Douglas W. Woods

Gepubliceerd in: Journal of Psychopathology and Behavioral Assessment | Uitgave 3/2016

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Abstract

Although photographic assessment has been found to be reliable in assessing hair loss in Trichotillomania, the validity of this method is unclear, particularly for gauging progress in treatment. The current study evaluated the psychometric properties of photographic assessment of change in Trichotillomania. Photographs showing hair loss of adults with Trichotillomania were taken before and after participating in a clinical trial for the condition. Undergraduate college students (N = 211) rated treatment response according to the photos, and additional archival data on hair pulling severity and psychosocial health were retrieved from the clinical trial. Photographic assessment of change was found to possess fair reliability (ICC = 0.53), acceptable criterion validity (r = 0.51), good concurrent validity (r = 0.30–0.36), and excellent incremental validity (ΔR 2 = 8.67, p < 0.01). In addition, photographic measures were significantly correlated with change in quality of life (r = 0.42), and thus could be considered an index of the social validity of Trichotillomania treatment. Gender of the photo rater and pulling topography affected the criterion validity of photographic assessment (partial η 2 = 0.05–0.11). Recommendations for improving photographic assessment and future directions for hair pulling research are discussed.
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Metagegevens
Titel
Photographic Assessment of Change in Trichotillomania: Psychometric Properties and Variables Influencing Interpretation
Auteurs
David C. Houghton
Maddison R. Franklin
Michael P. Twohig
Martin E. Franklin
Scott N. Compton
Angela M. Neal-Barnett
Stephen M. Saunders
Douglas W. Woods
Publicatiedatum
17-02-2016
Uitgeverij
Springer US
Gepubliceerd in
Journal of Psychopathology and Behavioral Assessment / Uitgave 3/2016
Print ISSN: 0882-2689
Elektronisch ISSN: 1573-3505
DOI
https://doi.org/10.1007/s10862-016-9536-z