title: Validation of Yoon's Critical Thinking Disposition Instrument.
abstract: OBJECTIVE
  The lack of reliable and valid evaluation tools targeting Korean nursing students' critical thinking (CT) abilities has been reported as one of the barriers to instructing and evaluating students in undergraduate programs. Yoon's Critical Thinking Disposition (YCTD) instrument was developed for Korean nursing students, but few studies have assessed its validity. This study aimed to validate the YCTD. Specifically, the YCTD was assessed to identify its cross-sectional and longitudinal measurement invariance.
  
  
  METHODS
  This was a validation study in which a cross-sectional and longitudinal (prenursing and postnursing practicum) survey was used to validate the YCTD using 345 nursing students at three universities in Seoul, Korea. The participants' CT abilities were assessed using the YCTD before and after completing an established pediatric nursing practicum. The validity of the YCTD was estimated and then group invariance test using multigroup confirmatory factor analysis was performed to confirm the measurement compatibility of multigroups.
  
  
  RESULTS
  A test of the seven-factor model showed that the YCTD demonstrated good construct validity. Multigroup confirmatory factor analysis findings for the measurement invariance suggested that this model structure demonstrated strong invariance between groups (i.e., configural, factor loading, and intercept combined) but weak invariance within a group (i.e., configural and factor loading combined).
  
  
  CONCLUSIONS
  In general, traditional methods for assessing instrument validity have been less than thorough. In this study, multigroup confirmatory factor analysis using cross-sectional and longitudinal measurement data allowed validation of the YCTD. This study concluded that the YCTD can be used for evaluating Korean nursing students' CT abilities.
authors.affiliation: College of Nursing Science, East-West Nursing Research Institute, Kyung Hee University, Seoul, South Korea. Electronic address: hsshin@khu.ac.kr.
authors.forename: Hyunsook
authors.initials: H
authors.lastname: Shin
authors.affiliation: Department of Biobehavioral Health Science, College of Nursing, University of Illinois at Chicago, USA.
authors.forename: Chang Gi
authors.initials: CG
authors.lastname: Park
authors.affiliation: College of Nursing Science, East-West Nursing Research Institute, Kyung Hee University, Seoul, South Korea.
authors.forename: Hyojin
authors.initials: H
authors.lastname: Kim
mesh_terms: D000328:Adult; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D010371:Pediatric Nursing / Q000193:education*; D011594:Psychometrics; D015203:Reproducibility of Results; D066106:Seoul; D013338:Students, Nursing / Q000523:psychology*; D013850:Thinking; D055815:Young Adult
keywords: critical thinking; factor analysis; measurement invariance; validation studies