Administered a complex reaction time task to 47 learning-disabled and 41 control children. The preparatory interval between a warning and act light was manipulated for length and regularity. Results indicated that the inability to sustain attention over time, rather than momentary inattentiveness, distinguished the two groups. (Author)

This study investigates the validity of the Stanford Binet Intelligence Scale-Fourth Edition (S-B:4) for use with students with learning disabilities. It compares the performance of 18 elementary-age students on the S-B:4 and the Kaufman Assessment Battery for Children (K-ABC). The subjects were identified by their school as having learning…

This study evaluated the diagnostic validity of a task measuring abstract categorization ability in learning disabled (LD) and non-LD children. Data showed that the component of abstract category knowledge that best disciminates LD children from non-LD, is the knowledge of how members of abstract categories differ from each other. (Author/JAZ)

Two studies with 658 white and 353 African-American elementary school children performing reaction time tasks are offered in support of Spearman's hypothesis about the relative size of the mean African-American-white differences on mental tests as a function of the tests' loadings on psychometric "g." (SLD)

The Kaufman Assessment Battery for Children (K-ABC) is purported to be less culturally biased than other, traditional measures of intellectual ability. The present study was designed to investigate three specific research questions: (1) Are there overall performance differences between Native American and non-Native American children on the WISC-R…

The relative math expectancies (RMEs) and math-performance attributions of 122 male and 177 female eighth graders were examined in relation to an Expectancy-Attribution process model of performance. Results from the Mathematics Attribution Scale and a RME rating scale support the model and indicate gender differences in cognitive patterns in…

Cognitive differences between 987 LD children and 178 EH children in public schools on a psychoeducational assessment battery were studied, and differences in factor structure were investigated. Caution is suggested in interpreting the results of multivariate statistical analyses, which indicated heterogeneity in the matrices of LD and EH…

Testwise responses of grade-school students to multiple-choice science items and the intercorrelations between different testwiseness skills were examined in this document. A total of 134 third-grade, 133 fifth-grade, and 143 sixth-grade students from two elementary schools in a large suburban school district in Utah responded to 60 science items…