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)

Learning characteristics of children with spina bifida (lesions on the spinal cord) are reviewed in the text of a presentation with slides, and the effects of such factors as hospitalization experiences and the presence of hydrocephalus are considered. Characteristics related to intelligence, sensory integration, tactile responsiveness, tactile…

Responses of 241 convicts on 18 primary mental abilities were factored to explore the idea that there are organizations among visual and auditory functions that operate independently from the relation-perceiving and correlate-educing functions of fluid and crystallized intelligence. The suggested reliable common-factor functions are discussed.…

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)

Based on the premise that perception is a continual series of simple hypotheses about the external world which are built up and selected by sensory experiences, this book explores in detail some of the major findings in perception and speculates about interconnections between sensory experiences, brain function, perception, and language and…

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)

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…

Draw-a-Person (DAP) samples from 108 adolescents and adults with mental retardation were scored using Naglieri's cognitive and emotional disturbance scoring systems. Visual-motor skills emerged as the best predictor of DAP cognitive scores, more predictive than intelligence. Findings suggest caution in using DAP as an index of intelligence or as a…

As a result of the interest in variables affecting language development, and because of concern with disadvantaged groups, this study, involving 134 first and second grade Mexican-American and Anglo students, investigated five questions: (1) Is language development affected by high structured instructional materials and procedures which teach…