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Purpose The purpose of this study was to determine item goodness-of-fit and the optimal categorization of an instrument measuring Korean elite young soccer player’s self-esteem using a two-facets Rasch model (item parameters and person parameters). Methods 10-item Rosenberg Self-Esteem Scale (RSES) with five response categories was administered to 366 elite young soccer players from the Korea football association. The Rasch analysis was conducted by WINSTEPS 3.65. Results First, the model fit the data well. Second, 5-category rating scale did function well. Third, a item-person map illustrated the distribution of RSES items and person’s level of self-esteem. Fourth, the separation reliability of the items and person was shown to be an acceptable degree of confidence, respectively. Lastly, there was statistically significant difference in self-esteem between starting players and bench players, which supported the known-difference evidence of validity. Conclusion These findings provided additional support for the suitability of the RSES in assessing self-esteem of Korean elite young soccer players.

Rasch calibration and optimal categorization of the Rosenberg Self-Esteem Scale with Korean elite young soccer players