Test-Retest Reliability and Minimal Detectable Change of the Test of Visual Perceptual Skills-Third Edition in Patients With Stroke

• Published in: Archives of physical medicine and rehabilitation Vol. 97; no. 11; pp. 1917 - 1923
• Main Authors: Chiu, En-Chi, OTD, PhD, Wu, Wen-Chi, OT, Chou, Chiung-Xia, OT, Yu, Min-Yuan, OT, Hung, Jen-Wen, MD
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.11.2016
• Subjects: Aged; Female; Humans; Male; Middle Aged; Physical Medicine and Rehabilitation; Physical Therapy Modalities; Rehabilitation; Reproducibility of Results; Stroke; Stroke Rehabilitation - methods; Vision Tests; Visual Perception; minimal detectable change; Stroke; TVPS-3; BI; Test of Visual Perceptual Skills-Third Edition; ICC; intraclass correlation coefficient; Reproducibility of results; Rehabilitation; MDC; Barthel Index; Visual perception
• ISSN: 0003-9993; 1532-821X
• DOI: 10.1016/j.apmr.2016.04.023

Abstract Objectives 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. Design Repeated-measures design (at an interval of 2wk). Setting Medical center. Participants Patients (N=50) with chronic stroke who completed the TVPS-3. Interventions Not applicable. Main Outcome Measures TVPS-3 that contains 7 subscales, namely, visual discrimination, visual memory, spatial relations, form constancy, sequential memory, visual figure-ground, and visual closure. Results 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. Conclusions 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.