The author questions whether social studies curriculum developers take into account the students' level of cognitive development in structuring courses for grades seven through ten. He also analyzes the consequences of this in terms of student attainment. (Author/RM)

The present study investigated the relationship between spatial placement of human figure drawings and measures of test anxiety, time estimation, and conceptual maturity. Results are discussed. (Author)

Twenty first-graders observed an adult model perform a quantity conservation task. The children were then tested on a series of generalization tasks immediately, after one week, and after three months. The results suggested that the social experience of observation appeared to activate a cognitive restructuring of the children's mental operations.…

A total of 174 first, second, and third graders were tested to examine the relation between perceptual salience and cognitive style. The results indicated that implusives made more errors than reflectives only on trials requiring the use of the least salient dimension and that these performance differences decreased with age. (JMB)

The performance of elementary school children on tasks requiring right and left hemisphere function was investigated and asymmetries in hemisphere function were discovered. (MP)

Different types of understandings are presented as different facets of the development of the mental processes. (MP)

Twenty-two mothers whose physiologic responses to infant signals had been recorded at an earlier date were videotaped with their infants during a feeding session when the infant was 9 months of age. Infants' development of the object concept was assessed at 15 months. (JMB)

Data analysis revealed that a post-organizer had a significant facilitating effect on immediate free-recall in a controlled lecture in college statistics, but no effect on immediate content recognition or delayed free-recall. (MP)

The relationship between performance on a Piaget-based infant scale and adaptive behavior was assessed for 25 developmentally disabled infants and preschool children. (Author)

Two experiments were conducted to explore the feasibility of training 42 and 72 mildly retarded adolescents to solve class-inclusion problems. (Author)

Intelligence levels of a sample of 180 Down's syndrome children were reported, and the results indicated that their abilities are not as limited as previously thought. (Author)

This study explores the acquisition of proportionality by investigating the relationship between an understanding of proportionality and the development of cognitive structure in the domain of mechanics. (Author/MA)

Deals with Piaget's research and theory over the past five decades. The purpose of the paper is to identify important aspects of Piaget's work and to refer the reader to sources readily available in books and periodicals. These are outlined in the annotated bibliography at the end of the paper. (Author/MA)

Early mental development of twins and siblings is analyzed, from an evolutionary viewpoint and related to the interplay of genetic programing, maturational status, and environmental influence. (MP)