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Rasch analysis of the Trypophobia Questionnaire.
Shu Imaizumi1,2, Yoshihiko Tanno3
1Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo, 153-8902, Japan. shuimaizumi@gmail.com.
BMC Research Notes
|February 16, 2018
Summary
The Trypophobia Questionnaire demonstrates good psychometric properties for assessing trypophobia proneness. Further validation is needed to determine the optimal version for practical use in measuring this specific phobia.
Area of Science:
- Psychometrics
- Clinical Psychology
- Behavioral Science
Background:
- Trypophobia is characterized by disgust and unpleasantness from visual stimuli of clusters.
- Assessing proneness to trypophobia requires reliable and valid measurement tools.
Purpose of the Study:
- To evaluate the Rasch-based psychometric properties of the Trypophobia Questionnaire.
- To determine the validity and reliability of the questionnaire for measuring trypophobia proneness.
Main Methods:
- Rasch analysis was applied to data from 582 healthy Japanese adults.
- The psychometric properties, including unidimensionality, response category ordering, and reliability, were assessed.
Main Results:
- The Trypophobia Questionnaire exhibited a unidimensional structure and adequate person/item reliability.
- No differential item functioning was found across sexes and age groups, but scale targeting needs improvement.
- A shortened version showed slightly better psychometric properties, though not conclusively superior.
Conclusions:
- The Trypophobia Questionnaire shows promising psychometric properties for assessing trypophobia.
- Further research is necessary to refine the scale and confirm its utility for clinical and research applications.
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