Abstract

The primary purpose of the pusont study is to investigate hyperactivity among preschool children and cognitive deficits associated with hyperactivity in the preschool age. In study I, 119 children between the ages of 4-years and 6 years llmonths were assessed for their hyperactive tendency through Conners abbreviated Teacher and Parent Rating Scales. The results indicated significant discrepancies between teacher and parent ratings, particularly around sex differences in hyperactivity. In study II, 14 children with teacher rating higher than 1 SD above the mean (Hyperactive Group) and 20 children with teacher rating lower than 1 SD below the mean (control gruop) were compared on their performance on MFFT and CPT. The results indicated that the hyperactive group made significantly more errors on MFFT and CPT, suggesting their impulsivity and difficulty on attention situation. When group differences in mental age was taken into account through covariate analysis of variance, the group differences were not significant except for the commission error on CPT.