Reexamines data from a study by Bayley and Schaefer and argues that no significant sex difference was demonstrated in their study. Points out that the male and female samples differed significantly with respect to both level of mother's education and children's IQ variance. (Author/JMB)

This article reviews sex studies of children of cousin marriages and three studies of children of incestuous matings. It is argued that these studies, taken as a whole, provide no substantial evidence for an inbreeding depression effect within the polygenic system commonly asserted to determine IQ. (Author/DB)

The Flynn effect, documented by a New Zealand political scientist, refers to the fact that average IQ scores have been increasing over time, reflecting the effects of environmental factors. Implications for the measurement of the intelligence of African American children and their educations are discussed. (SLD)

Traces social, cultural, economic, and political history shaping intelligence testing with respect to an inheritable intelligence level to conclude that interpretation of IQ has always been in a social and political context. (DW)

Data used to support Spearman's hypothesis have been incorrectly and inconsistently reported and do not support the claim that African-American-white differences in intelligence are not environmental in origin. Deaf children should not be considered a single population with respect to linguistic deprivation. (SLD)

Wolff has recently reinterpreted the data of Lee to indicate that Black migration from the south to Philadelphia had been selective in an IQ-relevant manner. However, Wolff's deduction from Lee's data is shown to depend entirely upon an assumption about cumulative IQ deficit in southern Black children. (Author/CTM)