Abstract
One aspect of construct validity is the extent to which the measurement properties of a rating scale are invariant across the groups being compared. An increasingly used method for assessing between-group differences in the measurement properties of items of a scale is the framework of differential item functioning (DIF). In this paper we introduce the concept of DIF as a validation tool for scales used in physical education and exercise science, and illustrate the use of the cumulative common log-odds ratio for assessing the presence of DIF with data from the Exercise Imagery Inventory (EII; Giacobbi, Hausenblas, & Penfield, 2005).
Original language | English (US) |
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Pages (from-to) | 451-464 |
Number of pages | 14 |
Journal | Research Quarterly for Exercise and Sport |
Volume | 78 |
Issue number | 5 |
DOIs | |
State | Published - Dec 2007 |
Keywords
- Psychometrics
- Research methods
- Statistics
- Validity
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Physical Therapy, Sports Therapy and Rehabilitation
- Psychology(all)
- Applied Psychology