The relative development of Piagetian concrete logical operational abilities was investigated in Mexican American and Anglo American children. Performance was assessed on eight classification tasks and three forms of transitivity, measuring seriation skills. One phase of the study compared the performances of 30 Anglo and 30 Mexican American…

To determine the relationship between parental childrearing practices, sex-role preference, and intellectual functioning in young boys, 21 lower class and 21 middle class white fathers were observed at home interacting with their 4-year-old sons. The Binet, the Peabody Picture Vocabulary Test, and Brown's "It" Scale were subsequently…