The relative effectiveness of two types of verbal reinforcement and one type of tangible reinforcement on a two-choice discrimination task was determined for middle and lower class male and female preschool children. It is suggested that consideration of baseline and IQ might have reconciled disparate findings of previous studies. (GO)

While debates over the heritability of IQ and the potential for culture bias in measuring instruments have generated much research and public comment, it is also possible to investigate the significance of interracial differences in mean IQ by ignoring both the foregoing issues and instead examining the social psychology of the test situation…

To assess the relationship between paternal behavior and the intellectual functioning of preschool boys and girls, 180 white fathers from middle, working, and lower classes (as defined by the Hollingshead-Redlich Scale) were observed at home interacting with their 4-year-olds (99 boys and 81 girls). Sessions were tape-recorded. The number of…