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Construction and Validation of a Self-Report Measure of Trichotillomania Distress: The Hairpulling Distress and Impairment Scale (HDIS)

Larson, Christine M
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1184697559

Abstract Details

2007, Doctor of Philosophy, University of Toledo, Psychology.
Individuals with Trichotillomania (TTM) engage in chronic, repetitive hair pulling, generally to the point of noticeable hair loss and considerable psychological distress. They may experience intense feelings of shame and guilt for engaging in this self-damaging behavior and for being unable to stop themselves from doing so. The current study was conducted to create and validate a new self-report measure to assess the broader suffering of TTM in adults. The measure developed, entitled the Hairpulling Distress and Impairment Scale (HDIS), could improve the ability of researchers and clinicians to assess individuals’ experiences of TTM and chronic hairpulling and to better inform TTM treatment. A heterogeneous group of 1189 hair pullers participated in the study, which utilized online data collection. Participants completed an online set of measures which included the HDIS, Massachusetts General Hospital Hairpulling Scale, Massachusetts General Hospital Trichotillomania Impact Scale, modified Psychiatric Institute Trichotillomania Scale, Beck Depression Inventory, and Beck Anxiety Inventory. The HDIS demonstrated good internal reliability, and its test-retest reliability over a two to four week period was excellent. Factor analysis using a Varimax rotation revealed the presence of three meaningful factors: “Interference,” “Shame,” and “Control,” each of which demonstrated adequate internal reliability and excellent test-retest reliability. The first factor, called “Interference,” consisted of 15 items which measured the general distress of chronic hairpulling. Means and standard deviations were calculated for the total and subscale scores. A correlation matrix was generated to reveal relationships between the total scores on each of the measures. Convergent validity was assessed by comparing the HDIS with three measures of hairpulling severity, and moderate to strong positive correlations were found. Divergent validity was assessed by comparing the HDIS with the BDI and the BAI, and, as predicted, small to moderate positive correlations were found. A reliable change index was calculated to provide a minimum change value by which reliable change on the HDIS Total Score and subscale scores could be demonstrated. The HDIS is a valid, reliable self-report measure which can be used in conjunction with existing measures of TTM symptom severity to assess the distress and interference associated with hairpulling.
Wesley Bullock (Advisor)
94 p.
Trichotillomania; hairpulling; hair pulling; distress; interference; measure development

Recommended Citations

Citations

  • Larson, C. M. (2007). Construction and Validation of a Self-Report Measure of Trichotillomania Distress: The Hairpulling Distress and Impairment Scale (HDIS) [Doctoral dissertation, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1184697559

    APA Style (7th edition)

  • Larson, Christine. Construction and Validation of a Self-Report Measure of Trichotillomania Distress: The Hairpulling Distress and Impairment Scale (HDIS). 2007. University of Toledo, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1184697559.

    MLA Style (8th edition)

  • Larson, Christine. "Construction and Validation of a Self-Report Measure of Trichotillomania Distress: The Hairpulling Distress and Impairment Scale (HDIS)." Doctoral dissertation, University of Toledo, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1184697559

    Chicago Manual of Style (17th edition)

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This open access ETD is published by University of Toledo and OhioLINK.