Although Ss underestimated the size of the illusion in the predicted direction, no significant correlations between size of illusion and either age or IQ were found. (Authors)

It was found, among other things, that rural Ss performed significantly below their mental ages more frequently than urban Ss; and that between the chronological ages of 10 to 14 years, while urban Ss appeared to perform as expected from mental ages, a significant number of rural Ss performed below expectations. (Author/DLS)

Results supported Piaget's viewpoint that mental imagery and general symbolic functioning are dependent on the growth of intelligence with respect to the preadolescent period. (Author)

Two groups of disabled readers, ages 8 and 11, were tested. Perceptual abilities related more strongly for younger students, while intelligence related more strongly for older students. Questions are raised about the validity of using expectancy formulae with younger disabled readers and the "learning disabilities" approach with older disabled…

Investigated suppression of activation and retrieval paths to information stored in long-term memory. Subjects were 94 children in grades 1, 3, and 5. Found that the ability to intentionally inhibit the maintenance and recall of irrelevant information improves over the elementary years, and children are less able than adults to withhold production…

Witkin's Embedded Figures Test (EFT) was used to measure the changes with age in field dependence and problem-solving ability. Qualitative data concerning problem-solving strategies and quantitative data were collected. EFT was administered to 12 females in each of the following decades: 20s, 30s, 40s, 50s, 60s, 70s. All subjects were moderately…

To assess the effects of age differences, type of task, intelligence (IQ), and reading achievement on referential communication performance, third and fifth grade children were asked to communicate messages for three types of tasks: word pairs, picture descriptions, and school-locations directions. The latter was specifically designed to assess…

A total of 125 white children from three counties in Georgia (selected as representative of small rural and medium and large industrial urban populations) were administered a battery of tests in three phases of their schooling: (1) during the summer preceding their admission to the first grade, (2) near the end of the first grade, and (3) near the…

Current research and though regarding the relationship of individual difference (ID) factors to achievement in the basic skills is reviewed. Four major categories and nine subcategories of ID factors are defined and serve as the framework for the review: status factors (age, sex, and race, ethnic group, and socioeconomic status); intelligence…