Abstract
The present study was designed to investigate characteristics by 38 school-age children in Grades 2, 4, and 6 of perseverative errors using the Wisconsin Card Sorting Test. Children's performance was measured as number of categories completed and perseverative errors, which were classified into perseverative errors of types described by Milner in 1963 and Nelson in 1976. Analysis indicated that the number of completed categories increased and perseverative errors decreased across age groups. Perseverative errors (Milner) were very similar in these grades and perseverative errors (Nelson) were significantly different between children in Grades 2 and 4. The results suggested a pattern of development for shifting inhibiting set.
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