Aptitude tests are defined in contrast to intelligence and achievement tests. Although aptitude tests, like intelligence tests, measure a student's overall performance across a broad range of mental capabilities, the former also often include items that measure more specialized abilities (such as verbal and numerical skills) that predict…

The general intelligence factor (g) was investigated using 170 university students across three batteries of ability measures: (1) a short-term memory battery; (2) the Multidimensional Aptitude Battery; and (3) a reaction time battery. Results support the notion of g and suggest short-term memory as an essential aspect of intelligence. (SLD)

To find the concurrent validity of two scholastic aptitude tests when a scholastic achievement test was used as a criterion for use in placement of mentally retarded children, 127 subjects were involved. The California Achievement Test (CAT) was used as a criterion measure, and the Primary Mental Abilities test (PMA) and the Slosson Intelligence…

In an Israeli community of low socioeconomic status, conventional ability measures and the Learning Potential Assessment Device (LPAD) were administered to 165 high-achieving intermediate grade students and their classmates. High-achieving students scored higher than classmates on both conventional and LPAD measures but scored higher than the norm…

Results of applying different aptitude-achievement discrepancy models for test scores were compared for 150 second, 150 third, 150 fourth, and 130 fifth graders in several school systems in the Southeast who had been referred for psychoeducational testing for learning disabilities to determine whether different groups of students were identified…

Sex differences in variability in the national norms of the Differential Aptitude Tests, Preliminary Scholastic Aptitude Test/Scholastic Aptitude Test, Wechsler Adult Intelligence Scales, and California Achievement Tests were examined. Compared to females, males were consistently more variable in quantitative reasoning, spatial visualization,…