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Gepubliceerd in: Journal of Psychopathology and Behavioral Assessment 2/2019

10-12-2018

Disentangling Reward Processing in Trichotillomania: ‘Wanting’ and ‘Liking’ Hair Pulling Have Distinct Clinical Correlates

Auteurs: Ivar Snorrason, Emily J. Ricketts, Ragnar P. Olafsson, Michelle Rozenman, Christopher S. Colwell, John Piacentini

Gepubliceerd in: Journal of Psychopathology and Behavioral Assessment | Uitgave 2/2019

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Abstract

Trichotillomania (TTM; hair-pulling disorder) is characterized by an irresistible urge or desire to pull out one’s own hair, and a sense of pleasure when hair is pulled out. Evidence from translational neuroscience has shown that ‘wanting’ (motivation to seek a reward) and ‘liking’ (enjoyment when reward is received) are each mediated by overlapping but distinct neural circuitry, and that ‘wanting’ contributes to addictive/compulsive behaviors more so than ‘liking’. In the present study, we developed the Hair Pulling Reward Scale (HPRS), a self-report measure that consists of two subscales designed to assess (a) cue-triggered urges and appetitive motivation to pull hair (i.e., putative correlates of ‘wanting’), and (b) momentary pleasure and gratification during pulling episodes (i.e., putative correlates of ‘liking’). We administered the HPRS to 259 individuals with TTM and examined its psychometric properties. Confirmatory factor analysis supported a two-factor model reflecting correlated Wanting and Liking scales. Consistent with predictions, Wanting, much more than Liking, had robust correlations with TTM severity, impulsiveness, difficulties in emotion regulation, psychiatric symptoms, and sleep dysfunction. The results suggest that the HPRS is a psychometrically sound instrument that can be used as a symptom-level measure of reward processing in TTM.
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Metagegevens
Titel
Disentangling Reward Processing in Trichotillomania: ‘Wanting’ and ‘Liking’ Hair Pulling Have Distinct Clinical Correlates
Auteurs
Ivar Snorrason
Emily J. Ricketts
Ragnar P. Olafsson
Michelle Rozenman
Christopher S. Colwell
John Piacentini
Publicatiedatum
10-12-2018
Uitgeverij
Springer US
Gepubliceerd in
Journal of Psychopathology and Behavioral Assessment / Uitgave 2/2019
Print ISSN: 0882-2689
Elektronisch ISSN: 1573-3505
DOI
https://doi.org/10.1007/s10862-018-9712-4

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