Performance of Wisconsin Card Sorting Test in five-year-old children in Taiwan: Relationship to intelligence and cognitive development

Objective: (1) To develop the norm of Wisconsin Card Sorting Test (WCST), (2) to investigate the pathway of the indices for WCST performances and (3) the association between WCST, intelligence quotient (IQ), and parent-report measures of children’s development in typically developing five-year-olds in the community. Method: Fifty-three children were recruited from community health centers. The WCST, Wechsler Preschool and Primary Scale of Intelligence-Revised (WPPSI-R), and Taiwan Birth Cohort Study- Developmental Instrument (TBCS-DI) was used to measure children's executive function, IQ and parent report of children's development respectively. Results: Mean categories achieved (CA) was 2.02 (standard deviation [SD] = 1.41), and percent conceptual level response (PCLR) was 29.85(SD = 18.36) in five year-olds. The WCST indices showed a pathway relationship of PCLR being negatively associated with perseverative error (PE), and PE and non- perseverative error being negatively associated with CA. Association among the PCLR index of the WCST, cognitive domain of the TBCS-DI, and performance IQ and verbal IQ of the WPPSI-R was found. Conclusion: Regular improvement with age was found compared to the norm of six-year-olds in a previous study of children from the same region. The number sorting criteria was more difficult thus they continued to perform persistent errors of color or form when sorting. Association was found among the professional administered IQ, computerized WCST, and a parent report developmental instrument. Showing parent report is an accurate reflection of children's cognitive development at this age.