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…

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)

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.…

A study was conducted to investigate the predictive validity of parents' ability to attend to their children (ATA) on intelligence and to determine to what extent ATA and social class variables, in combination, can account for the discrepancy in the IQ scores of children of different races. Ss were 700 Head Start children. The criterion variables…

Contents of this symposium comprises: Introduction (W. B. Dockrell); The Genetics of Intelligence (Sir C. Burt); Structuring Mental Acts (P. R. Merrifield); A "Piagetian" Test of Cognitive Development (R. D. Tuddenham); The British Intelligence Scale (R. W. Warburton); Intelligence (P. E. Vernon); Hierarchical Theories of Mental Ability…

Examines national data sets of cognitive scores for intellectual dysgenesis by considering race, socioeconomic status, and ability-related changes in test scores over time. The analysis did not support the dysgenic hypothesis; however, it indicates a convergence of the various segments of U.S. society. (MMU)

The major interest of this study is the amount of time children spend reading. Data was gathered unobtrusively by having the 150 5th grade subjects keep time records of all their activities for a 2 week period. These were coded into 7 categories and scores were related to those derived from tests of ability, achievement, self-concept and reading…

The major emphasis of this study is on the comparative validities of paired-associate learning tests and IQ tests in predicting reading achievement. The study engages in a brief review of earlier research in order to examine the validity of two assumptions--that the construction and/or the use of a tactic that simplifies a learning task is one of…

This book on the genetic and environmental influences on intelligence is comprised of the following papers: "The Structure of Intelligence in Relation to the Nature-Nurture Controversy," R. B. Cattell; "Theory of Intelligence," L. G. Humphreys; "Using Measured Intelligence Intelligently," P. R. Merrifield; "Intelligence: Definition, Theory, and…

This study attempts to determine whether the pattern of human abilities varies or remains constant over a range of ability levels. Scores on 12 aptitude and achievement tests for 11,743 subjects, subdivided into four groups according to intelligence and socioeconomic status, were used. A technique, developed by Joreskog, for simultaneously factor…

Discussed are the theoretical explanations of the observation that low intelligence quotient (IQ), low socioeconomic status children appear to be brighter in certain ways than low IQ middle class youngsters. The two different theories on IQ as a function of socioeconomic status--environmental or cultural vs. genetically determined biological…