Intelligence tests were administered to a stratified sample of 4058 school children from Palermo, Sicily. I.Q. scores were found to be positively correlated with socioeconomic status and negatively related to family size. As birth order increased, mental development decreased. Implications for future research were discussed. (EH)

Evaluated with 198 grade 5 students, 94 of whom were classified as high socioeconomic status (SES) and 94 as low SES, were corrolaries of A.R. Jensen's distinction between Level I (associative learning) and Level II (conceptual learning) aspects of intelligence. (Author/DB)

Finds that the available data for the heretability of intelligence is inadequate to settle the question conclusively. Argues that the benefits of diversity can only be realized if equality of opportunity is complimented by equality of status. (EH)

This paper presents the results of a study which examined heritability ratios for the major ethnic and socioeconomic groups in the Los Angeles Unified School District. Scores on three measures (the Cooperative Primary Reading Test, the Comprehensive Test of Basic Skills, and a composite set of intelligence tests) were compared for twins from…

Trotman responds to two criticisms of her previous research (EJ 168 902) on racial differences in intelligence and achievement. She clarifies the conclusions criticized by Longstreth (TM 503 913) and criticizes the conclusions reached by Wolff (TM 503 914). (BH)

Subjects were 30 boys aged 9-12 with learning disabilities. Lower socioeconomic status (LSES) learning-disabled boys scored lower than the normal population on both verbal and performance scales of the WISC while upper-middle socioeconomic status (USES) boys scored lower only on verbal tests. USES boys scored higher than LSES boys in Performance…

Studies the relationship between social class and intelligence age five among 400 children of mature birthweight and without significant prenatal complications, in order to identify variables which would statistically account for the influence of social class upon I.Q. (Author/JM)

Criticizes claims in "The Bell Curve" that a high value for heritability of intelligence constrains the extent to which environmental changes can increase intelligence. Cites adoption studies and the increasing intelligence of successive cohorts of U.S. children as evidence that intelligence can increase substantially without heroic…

The author reexamines the controversy surrounding his genetic hypothesis in an attempt to clarify his contention that differences in IQ scores between blacks and whites may be attributable as much to heredity as environment. (EH)

Second generation, middle-class, Black youth and middle-class White youth completed the Stanford Binet, WISC-R, or the WAIS. Results indicated that Black youth exceeded the White sample mean on the Stanford Binet and the WISC-R. Previous intelligence differences may have reflected educational and socioeconomic differences. (Author/RC)

Examined 128 children for contributions of biomedical risk conditions, SES, and HOME scores to prediction of intelligence, and association of extreme scores on HOME and SES to intelligence-test performance. Found home environment was the most important predictor of intelligence at all ages, with SES showing a smaller effect beginning at age 5.…

In an investigation of racial differences on an "intelligence" test containing items specific to the Black environment, black subjects had a higher mean score than white subjects and there was no positive correlation between the Black Intelligence Test and the Shipley Institute of Living Scale, a traditional intelligence test. Thus, racial…

Part of a larger study on The Employment Status of Mentally Retarded Adults in New York City prepared for the Manpower Administration, U. S. Department of Labor.