Factor analysis of the Milwaukee Inventory for Subtypes of Trichotillomania-Adult Version.
The Milwaukee Inventory for Subtypes of Trichotillomania-Adult Version (MIST-A; Flessner et al., 2008) measures the degree to which hair pulling in Trichotillomania (TTM) can be described as "automatic" (i.e., done without awareness and unrelated to affective states) and/or "focused" (i.e., done with awareness and to regulate affective states). Despite preliminary evidence in support of the psychometric properties of the MIST-A, emerging research suggests the original factor structure may not optimally capture TTM phenomenology. Using data from a treatment-seeking TTM sample, the current study examined the factor structure of the MIST-A via exploratory factor analysis. The resulting two factor solution suggested the MIST-A consists of a 5-item "awareness of pulling" factor that measures the degree to which pulling is done with awareness and an 8-item "internal-regulated pulling" factor that measures the degree to which pulling is done to regulate internal stimuli (e.g., emotions, cognitions, and urges). Correlational analyses provided preliminary evidence for the validity of these derived factors. Findings from this study challenge the notions of "automatic" and "focused" pulling styles and suggest that researchers should continue to explore TTM subtypes.
Department of Psychology, Texas A&M University, 4235 TAMU, College Station, TX 77840, USA.
Jennifer R
JR
Alexander
Department of Psychology, Texas A&M University, 4235 TAMU, College Station, TX 77840, USA.
David C
DC
Houghton
Department of Psychology, Utah State University, 2810 Old Main Hill, Logan, UT 84322, USA.
Michael P
MP
Twohig
Department of Psychiatry, University of Pennsylvania School of Medicine, 3535 Market St., Philadelphia, PA 19104, USA.
Martin E
ME
Franklin
Department of Psychology, Marquette University, 604 N. 16th St., Milwaukee, WI 53233, USA.
Stephen M
SM
Saunders
Department of Psychology, Kent State University, 600 Hilltop Drive, Kent, OH 44242, USA.
Angela M
AM
Neal-Barnett
Department of Psychiatry and Behavioral Sciences, Duke University School of Medicine, 2213 Elba St., Durham, NC 27705, USA.
Scott N
SN
Compton
Department of Psychology, Texas A&M University, 4235 TAMU, College Station, TX 77840, USA; Department of Psychology, Marquette University, 604 N. 16th St., Milwaukee, WI 53233, USA.
Douglas W
DW
Woods
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