Characteristics of perseverative errors by school-age children

The present study was designed to investigate characteristics by 38 school- age children in Grades 2, 4, and 6 of perseverative errors using the Wiscon sin Card Sorting Test. Children's performance was measured as number of cat egories completed and perseverative errors, which were classified into pers everative errors of types described by Milner in 1963 and Nelson in 1976. A nalysis indicated that the number of completed categories increased and per severative 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 sug gested a pattern of development for shifting inhibiting set.