Abstract

The primary purpose of the present study was to evaluate reliability and validity of the Korean version of Abbreviated Corners Rating Scale(ACRS). 1239 elementary school children in grade 1 through grade 6 were rated by their parents using the 10 item ACRS. Of these children, 684 children were also rated with the same 10 item ACRS by their teachers. Both parent's and teacher's form of the ACRS showed high reliability but correlation between the parent's and teacher's ACRS total score was relatively low suggesting cross-situational variability of hyperactive behavior pattern. Children of fathers with relatively fewer years of education were rated as more hyperactive by their parents than those of fathers with higher level of education, but teacher rating did not reflect differences depending on the level of father's education. Boys were rated as more hyperactive than girls by both parents and teachers. Teacher's rating indicated hyperactive behavior pattern decline with age, while such age-associated change was not apparent in parent rating data. Factor analysis of teacher rating data consistently revealed two factors(conduct disorder and emotional lability), while the same analysis of parental rating data suggested a possible third factor(inattention). Two standard deviations above the mean(M+2SD) in total ACRS score which was suggested as a criterion for defining hyperactive sample corresponds to 16 for parental. rating and 17 for teacher's rating.