title: Comparison of K-ABC performance between at-risk and normal preschool children.
abstract: This study examined differences in K-ABC performance between at-risk (n = 44) and normal (n = 49) preschool children. For the group at-risk, all of the mean global scores on the K-ABC clustered around a standard score of approximately 90. The normal group's mean scores were 15 to 21 standard-score points higher and clustered near 110. The results of t tests for independent samples indicated that the normal group's scores on both the global scales and K-ABC subtests were significantly higher than the at-risk group's scores in nearly every instance. Correlations among scores were consistent with previous findings for preschoolers on the K-ABC. For the normal group, correlations obtained among the global scales were nearly identical to those reported for the standardization sample. For the at-risk group, however, the correlation of .75 between Sequential processing and Achievement was higher than that (.58) between Simultaneous processing and Achievement.
authors.affiliation: Department of Psychology, University of Wisconsin-River Falls 54022.
authors.forename: M A
authors.initials: MA
authors.lastname: Lyon
authors.forename: D K
authors.initials: DK
authors.lastname: Smith
authors.forename: P D
authors.initials: PD
authors.lastname: Klass
mesh_terms: D000124:Achievement; D002675:Child, Preschool; D004519:Education, Special; D005260:Female; D006801:Humans; D007361:Intelligence Tests; D007805:Language Development Disorders / Q000523:psychology*; D007859:Learning Disabilities / Q000523:psychology*; D008297:Male; D012307:Risk Factors