This study examined the effects of providing training in identity, reversibility, and compensation explanations, alone and in every combination, for eight matched groups of 48 mildly retarded, nonconserving children. (Author/JMB)

This study examined the resistance to conservation of quantity extinction in 180 subjects across the life span. The results indicated that both resistance judgments and explanations were found to develop in a curvilinear fashion, increasing with age until young adulthood and declining thereafter. (JMB)

Two studies were conducted to examine whether the elderly maintain the competence to solve Piagetian conservation problems. The results are discussed in terms of a distinction between competence and performance. (JMB)

University students' understanding of the laws of matter conservation, weight conservation, gravity and the functioning of levers were examined before, during, and after a traditional weight conservation task in which a surreptitious deception caused the pan balance scale not to balance. (Author/JMB)

A shortened version of a learning-set training procedure was given to 80 children four and five years of age. These children and 16 untrained controls were then tested for quantity conservation. Results relate task performance on the conservation tasks to the type of training received. (Author/JMB)

Purpose of study was to investigate the applicability of Piaget's theory and methods to the study of conservation in nonhumans. Two out of four subject monkeys achieved stringent and statistically significant performance criteria in sameness-difference judgment tests and showed significant generalization in the fewest possible trials. (Author/SB)

Reported is a study which measured conservation of length among kindergarten and first-grade subjects using several verbal and nonverbal procedures. The results indicated that conservation of length is not a simple unitary concept, but has empirical gradations. (Author/CT)

This article discusses the results of an earlier experiment which demonstrated a relationship between children's prior understanding of the compensation rule and their tendency to benefit from conservation training. These earlier results are then compared to the results of this experiment which employed different procedures and found no such…

This study assessed the recognition by conserving and nonconserving first graders, of true and false permise and inference sentences following story presentations. Conservers performed slightly better than nonconservers on sentences other than true inference sentences, thus indicating that concrete mental operations are related to the process of…

Sixty kindergarten, first-grade, and second-grade children were required to construct numerically equivalent collections and to determine asymmetric-transitive relations among nonequivalent collections, using two strategies of cardinal number: correspondence and counting. A novel "collinear correspondence" task was also introduced and compared…

Study compared provoked and spontaneous one-to-one correspondence along with two tasks having more preceptual support for correspondence. In opposition to Piaget's predictions, the four levels of correspondence did not differ in difficulty for kindergarteners. (Author/SB)

Stimulus conditions were found to interact with conservation level and relation type. (MM)

This survey reported one phase of a larger project. The goals of the project are to plan and conduct a public education program on energy-related concerns that will produce an informed public, willing to support and cooperate with the strategies necessary for the long-term resolution of our energy problems. Reported in this document are the…

Demonstrates that conservation of amount does not always precede conservation of weight. Subjects were 60 six-year-old children. (BD)

Examines the developmental sequence of skills involved in the understanding of relational concepts and in the development of conservation. Fifty kindergarten children participated in the study. (BD/BR)