Research on sibling influence on intellectual ability has shown that academic ability and achievement decrease as family size increases and as spacing between siblings decreases. Research also suggests a relationship between sex of subject and of sibling, and age differences in the effects of birth order and sibling sex. (JAC)

Many academic examinations exhibit sex differences in terms of entry figures and pass rates. This fact is illustrated by a selection of statistics from the British GCE "O" level examination results for June 1976. These results are discussed in terms of three possible causes: innate differences in intellectual functioning, sex role…

Reviews data from the "High School and Beyond" study to examine sibling intellectual symmetry and the degree to which family background affects the siblings' intellectual ability. Finds considerable symmetry in intellectual skills. Discovers little impact on symmetry from gender or birth order. (CFR)

R. J. Sternberg and others found that the types of behaviors reported by laypersons as characterizing different types of intelligence varied across the different groups tested, and that a person's concept of intelligence affects the manner in which he or she evaluates the intelligence of others. Two experiments by Sternberg et al. were replicated.…

Robert L. Thorndike was awarded the Educational Testing Service (ETS) Measurement Award at the 1972 ETS Invitational Conference. In "Heredity, Environment, and Class or Ethnic Differences," J. McV. Hunt addressed several fundamental questions pertaining to the hereditary and environmental influences of the observed social class and ethnic…