ArticlePloS one2025
Reliability of the Test of Visual Perceptual Skills-4th Edition for people with schizophrenia.
Article in PloS one, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundThe Test of Visual Perceptual Skills-4th Edition (TVPS-4) is widely used for repeated measures of visual perception. This study aimed to examine the test-retest reliability, internal consistency, and practice effect of the TVPS-4 in people with schizophrenia receiving care in community psychiatric rehabilitation facilities.
methodsA repeated assessment design was employed, involving 80 participants. Test-retest reliability was evaluated using the intraclass correlation coefficient (ICC) and Pearson's r. Internal consistency was evaluated using Cronbach's alpha (α). Minimal detectable change (MDC) values were calculated at 95%, 90%, and 80% confidence levels. The MDC% was determined based on the MDC with 95% certainty. Cohen's d effect sizes and paired t-tests were utilized to assess the practice effect.
resultsThe ICC and Pearson's r of the overall scale were 0.93 and 0.95, respectively. The ICC and Pearson's r of the seven subscales were 0.59-0.84 and 0.61-0.84, respectively. The α was 0.66-0.90 and 0.73-0.89 in the first and second assessment, respectively. The MDC95 (MDC%), MDC90, and MDC80 ranged from 4.7-16.3 (13.2-34.8%), 3.9-13.6, and 3.1-10.6, respectively. Cohen's ds were 0.06-0.26 and paired t-test showed significant differences in scores of the overall scale and the four subscales (p < 0.05).
conclusionThe TVPS-4 has acceptable test-retest reliability, satisfactory internal consistency, and trivial to small practice effect. The MDCs at different confidence levels can be used to interpret the score changes at a particular level of certainty for individuals with schizophrenia.
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