Among a group of 103 children with a mean age of eight years, full-scale IQ correlation was significantly higher for monozygotic than dizygotic pairs. Monozygotic pairs also showed significantly greater concordance for subtest profile than dizygotic pairs. The usefulness of profile analysis is examined, and directions for future research are…

Intercorrelations of 10 successive years of measurement of height and intelligence are presented for separate samples of girls and boys from the Harvard Growth Study. Findings did not differ appreciably by sex, but significant differences between the sexes in the cross-correlations were found. (Author/RH)

Written in response to an article (Horn, 1983) that appeared in special Developmental Behavioral Genetics section of CHILD DEVELOPMENT (Volume 54), this commentary (1) notes some issues concerning Horn's analysis and interpretation of data and (2) highlights the potential for interpretational bias in behavior genetics research. (Author/BE)

In this rebuttal to Walker and Emory's commentary (also in this issue), Horn argues that the issue of the influence of environment on the average IQ of adopted children was well discussed in his article (Volume 54 of CHILD DEVELOPMENT). (BE)

The IQ performance of children who experienced the birth of a younger sibling was found to drop 10 points during the next two years for singleton children and 5.8 points for last-born children from families of comparable size. The study controlled for sex, family size, age at assessment, and IQ before the birth of the sibling. (Author/RH)

Studied the sleep state organization and EEG patterns at term date in 53 preterm infants as an index of the maturity and integrity of neurophysiological organization that may have implications for their later development. (HOD)

Data from an early intervention program for children at risk for developmental retardation were used to investigate two kinds of intellectual plasticity: developmental functions and individual differences. Possible convergences between the two realms of development are examined. (Author/RH)

Two studies examined the relation between current developmental levels, as estimated by IQ, and proximal levels of development, as estimated by the efficiency of learning and transfer in assisted contexts. Subjects were 8- to ll-year-old children. Theoretical and clinical implications are discussed. (HOD)

Explores age differences (6 to 22 years of age) in conceptions about the nature of the skills required by verbal and nonverbal (abstract) intelligence tests. (HOD)

Among 278 inner-city men studied for four decades and over three generations, eight variables captured 28 percent of the explained variance in upward social mobility: IQ, mother's education, mother's occupation, boyhood ego strength, and four ego defense mechanisms--intellectualization, dissociation, sublimation, and anticipation.…

Tests causal models of verbal and performance IQ in 69 Mexican-American children of low socioeconomic status. Years of mother's education were correlated with IQ at 3 years and at 6 to 8 years, but traditional/nontraditional attitudes showed conflicting correlations over time. The adequacy of standarized IQ tests for this population is questioned.…

Reports data on several measures for 160 low income black ninth- and tenth-graders who participated for one year in Bereiter-Engelmann, DARCEE, Montessori, or traditional prekindergarten. Discusses possible relationships between techniques used in different preschool programs and sex differences in achievement level and IQ. (Author/CB)