Purpose The purpose of this study was to apply Rasch analysis to examine the unidimensionality and reliability of the General Self-Efficacy Scale (GSE) in workers with traumatic limb injuries. Furthermore, if the items of the GSE fitted the Rasch model’s assumptions, we transformed the raw sum ordinal scores of the GSE into Rasch interval scores. Methods A total of 1076 participants completed the GSE at 1 month post injury. Rasch analysis was used to examine the unidimensionality and person reliability of the GSE. The unidimensionality of the GSE was verified by determining whether the items fit the Rasch model’s assumptions: (1) item fit indices: infit and outfit mean square (MNSQ) ranged from 0.6 to 1.4; and (2) the eigenvalue of the first factor extracted from principal component analysis (PCA) for residuals was

Original languageEnglish
Pages (from-to)332-339
Number of pages8
JournalJournal of Occupational Rehabilitation
Issue number3
Publication statusPublished - Sept 2016


  • Rasch analysis
  • Self-efficacy
  • Traumatic limb injury
  • Unidimensionality

ASJC Scopus subject areas

  • Rehabilitation
  • Occupational Therapy


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