Validation of Yonsei-Bilateral Activity Test (Y-BAT)-Bilateral Upper Extremity Inventory Using Rasch Analysis

Joo Hyun Lee, Ickpyo Hong, Ji Hyuk Park, Joon Ho Shin

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


There is little assessment to provide specific information about quality of bilateral upper extremity movement specifically. This study examined the psychometric properties of the Yonsei-Bilateral Activity Test (Y-BAT). An observational cross-sectional design was used with 100 stroke survivors. Unidimensionality was examined using factor analyses, and Rasch analysis was used to test rating scale structure, fit statistics, and precision of the Y-BAT. The Y-BAT demonstrated a unidimensional measurement construct, and 19 of the 27 items fit the Rasch model. The instrument demonstrated good precision, including person reliability and person strata. The Y-BAT estimated person measures within a wide range of theta values with a reliability of.9 with good precision. Our results indicate that a revised, 19-item version of the Y-BAT demonstrates sound internal validity and may be a useful instrument for clinicians to measure upper extremity function with good precision following stroke.

Original languageEnglish (US)
Pages (from-to)277-286
Number of pages10
JournalOTJR Occupation, Participation and Health
Issue number4
StatePublished - Oct 1 2020


  • Rasch analysis
  • assessment
  • bilateral upper extremity
  • psychometrics
  • stroke

ASJC Scopus subject areas

  • Occupational Therapy


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