title: Test-Retest Reliability and Minimal Detectable Change of the Test of Visual Perceptual Skills-Third Edition in Patients With Stroke.
abstract: To examine the test-retest reliability, calculate minimal detectable change (MDC), and report internal consistency of the Test of Visual Perceptual Skills-Third Edition (TVPS-3) in patients with stroke.
  
  
  
  Repeated-measures design (at an interval of 2wk).
  
  
  
  Medical center.
  
  
  
  Patients (N=50) with chronic stroke who completed the TVPS-3.
  
  
  
  Not applicable.
  
  
  
  TVPS-3 that contains 7 subscales, namely, visual discrimination, visual memory, spatial relations, form constancy, sequential memory, visual figure-ground, and visual closure.
  
  
  
  The intraclass correlation coefficient value of the overall scale was .92 and those of the 7 subscales were .53 to .82. The MDC values of the overall scale and the subscales were 18.1 and 5.4 to 7.1, respectively. The MDC% value of the overall scale was 16.2% (<30%), showing acceptable random measurement error. However, the MDC% values of the subscales were 33.7% to 44.1% (>30%), indicating substantial random measurement errors. The Cronbach α of the 7 subscales were .71 to .89, indicating good internal consistency.
  
  
  
  Our results showed that the overall scale of the TVPS-3 had satisfactory test-retest reliability. However, the subscales demonstrated insufficient test-retest reliability. Therefore, the subscales should be used cautiously to explain the test results over repeated assessments in patients with stroke.
authors.affiliation: Department of Long-Term Care, National Taipei University of Nursing and Health Sciences, Taipei, Taiwan.
authors.forename: En-Chi
authors.initials: EC
authors.lastname: Chiu
authors.affiliation: Department of Physical Medicine and Rehabilitation, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung City, Taiwan. Electronic address: wendy.wu224@gmail.com.
authors.forename: Wen-Chi
authors.initials: WC
authors.lastname: Wu
authors.affiliation: Department of Physical Medicine and Rehabilitation, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung City, Taiwan.
authors.forename: Chiung-Xia
authors.initials: CX
authors.lastname: Chou
authors.affiliation: Department of Physical Medicine and Rehabilitation, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung City, Taiwan.
authors.forename: Min-Yuan
authors.initials: MY
authors.lastname: Yu
authors.affiliation: Department of Physical Medicine and Rehabilitation, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung City, Taiwan; Chang Gung University, College of Medicine, Kaohsiung, Taiwan.
authors.forename: Jen-Wen
authors.initials: JW
authors.lastname: Hung
mesh_terms: D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D026741:Physical Therapy Modalities; D015203:Reproducibility of Results; D000071939:Stroke Rehabilitation / Q000379:methods*; D014787:Vision Tests; D014796:Visual Perception
keywords: Rehabilitation; Reproducibility of results; Stroke; Visual perception