Effects of maltreatment were examined in three domains suggested by attachment theory: relationships with novel adults, effectance motivation, and cognitive maturity. Three samples of four- to eight-year-old children were studied: 93 maltreated children, 67 demographically matched nonmaltreated childen, and 30 nonmaltreated middle-class children.

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,…

A total of 122 kindergartners, third and fifth graders viewed 30 pictures of familiar objects and interested on their free recall of the object names and their recognition of the original pictures. Half received instruction in adult recognition strategies, half in adult recall strategies. (MS)

Examined the performance of kindergartners from middle- and low-income families on arithmetic calculations presented in a nonverbal format and in three verbal formats. Children from middle-income families performed better than those from low-income families on verbal calculation tasks but not on the nonverbal task. (BC)