Many people have serious difficulties in understanding rational numbers, limiting their ability to interpret and make use of them in modern daily life. This also leads to later difficulties in learning more advanced mathematical content. In this study, novel tasks are used to measure 263 late primary school students' spontaneous focusing on…

Mildly retarded young adults were given simple and choice reaction time (RT) tests. Subjects' RTs increased with stimulus complexity. RTs of retarded subjects were slower and evidenced more intraindividual variability than those of nonretarded subjects. Several RT parameters were related to measures of intelligence. (Author/RD)

The extent to which college students performed differentially on 3 x 3 figural analogies administered under two elaborative testing conditions was investigated. Results indicated that subjects who demonstrated a preferred testing condition performed more effectively upon retesting than did a control group not displaying differential performance as…

Reaction time and movement time were negatively and moderately-to-strongly correlated with Ravens matrices performance and with reading comprehension and performance on the California Test of Basic Skills for 20 ninth-grade girls. Weaker relationships were found for mathematics and English grades, although the direction was consistently negative.…

This paper examines cognitive processing problems associated with attention deficit disorders (ADD) and their relationship to learning disabilities in elementary and secondary students. Children with ADD, medicated (N=20) and unmedicated (N=21), were compared on the Raven test of Progressive Matrices and other tests with children who had been…

Cognitive processes in the Raven Progressive Matrices Test, a nonverbal test of analytic intelligence, are analyzed in terms of processes distinguishing between high- and low-scoring students and processes common to all subjects and test items. Two experiments with 89 college students identify the abilities distinguishing among individuals. (SLD)