There is general consensus that the representation of the human face becomes functionally specialized within the first few months of an infant's life. The literature is divided, however, on the question whether the specialized representation of the remainder of the human body form follows a similarly rapid trajectory or emerges more slowly and in…

Studied the relationship between mental age and progression toward Piaget's stages of concrete operations and formal operations in a sample of middle class children. Formal operations in preadolescence and adulthood are discussed in relation to IQ. (GO)

Black children (N=233) from three age levels and two socioeconomic (SES) levels were given five Piagetian tasks to determine if differences in sex were associated with differences in cognitive development levels. Results showed that higher SES children performed better than lower SES children on all five measures of reasoning, seriation,…