The simultaneous and successive processing model of cognitive abilities was compared to a traditional primary mental abilities model. Simultaneous processing was found to be primarily related to spatial ability; and to a lesser extent, to memory and inductive reasoning. Subjects were 104 fourth-grade urban males. (Author/GD C)

Research on laterality and intellectual abilities suggests that left-handed persons may be divided into two categories: one not discriminably different from those who are right-handed, and one deficient in intellectual and cognitive abilities. 7688 children were tested on handedness, intellectual performance, and scholastic aptitude in order to…

The Wechsler Intelligence Scale for Children-Revised, the Slosson Intelligence Test, and the National Education Development Test were administered to a small sample of private school children ranging in age from 12.3 to 14.1 years. Correlations among these measures were moderate to high. (JKS)

The concept of selection ratios was illustrated for large clinical settings. Four Draw-A-Person (DAP) variables were used to predict intelligence in a sample of 601 institutionalized addicts. Results indicate that a test with low predictability across the entire distribution can often be used quite effectively for identifying poor or excellent…

After seven years, a group (N=32) of originally nonemployed poverty-level older people (over 60) now employed as foster grandparents were retested with the WAIS. Three subtest scores showed stability and Digit Span showed a statistically significant drop. Neither age nor initial level of health or WAIS scores was related to test-score changes over…

Available from: Arthur Retlaw and Associates, Inc., Suite 2080, 1603 Orrington Avenue, Evanston, Illinois 60201. A sample of 4-year-old children (n=111) with PKU (phenylketonuria) who were placed on dietary therapy between 3 and 92 days of age were assigned to two treatment groups based on "moderate" and "low" serum…

Two experiments were concerned with exploring the relative accessibility and availability of category information in retarded adolescents in comparison with CA equivalent nonretarded subjects. (Author/SB)

The current state of experimental research on mental retardation is considered from a historical perspective. (Author)

Presents a study of the development of conservation of weight among socially deviant adolescents. (BD)

The response of mentally retarded children to various stimuli (low active remain low active, high active remain high active) relates activity to intelligence and suggests that, for low intellectual functioning subjects, the retardation was due to endogenous reasons with consequent organic brain involvement affecting mechanisms controlling activity…

This research attempts to determine the usefulness of assessing academic achievement motivation, biographical information, and parental perceptions in the prediction of academic achievement and reading efficiency. The Iowa Test of Basic Skills (ITBS) and the Lorge-Thorndike IQ test provided data for criterion measures of educational achievement…

The author discusses general principles, rationale, and methods used in the training of graduate students in general intelligence testing instruments at the University of Calgary. (MB)

The author argues that by ignoring evolutionary considerations, the intelligence testing movement has precluded continued development, and in order to regain momentum it must engage in theoretical and empirical research to accommodate those considerations. (MB)