Micronesian children residing on Truk and Kosrae were examined for performance on eight conservation tasks and on one task each of centration and reversibility (generally precursors of conservation in Piaget's theory of cognitive development). A total of 75 children were tested--33 in the village of Moen, Truk, and 42 in all the villages of…

Displays that by themselves always elicited chance judgment of number were shown to three- to four-year-olds and six- to seven-year-olds. The first display was transformed into the second, and so on. Results indicated that three- to four-year-olds do not understand conservation of number because judgements of successive displays were independent…

The processes by which children construct images of anticipated end states of a transposition movement were examined on two tasks. Results support Piaget's (1977) hypothesis that reasoning on the basis of state correspondence defines a developmental level which precedes the development of transformational thought. (Author/MP)

For 89 White children 6 to 11 years old and of upper middle class, scores on Piagetian tasks of conservation of length and volume were related to age but field independence was correlated significantly to these scores. (Author)

Suggests an approach to the assessment of children's conservation ability which analyzes the stimulus variables and cognitive performance. The analysis of performance variables focuses on the role of attention. (MP)

Questions concerning the conservation of a nonequivalent volume were posed to 65 nonconservers in terms of an imagined reward. Results indicated significantly more nonconservers demonstrated an awareness of empirical reversal or performed the preference relational operation correctly as compared to conditions that required comparative-relational…

Children at three age levels (4-6, 7-9, and 10-14 years) performed a reaction-time version of Piaget and Inhelder's rotating squares imagery task and a pivot and shape conservation recognition task. (JMB)

Two experiments were conducted to study developmental changes in the integration of stimulus dimensions in an area judgment task. Following functional measurement methodology, absolute judgments on a linear graphic rating scale were obtained. (Author/SS)

Studied the development of the concepts of energy conservation and entropy in 5- to 15-year-old children. Energy conservation was not well understood until about age 15. Entropy was understood by 9- to 15-year-olds when the concept was illustrated by the gradual mixing of differently colored, rolling marbles. (Author/DB)

Attempted to determine to what extent the conservation concepts of young children change in the period between kindergarten and first grade. (DD)

Results of this study involving 120 kindergarten and first-grade boys and girls suggest that some understanding of the invariance of number appears to emerge earlier than the ability to pass the standard verbal test. (BH)

Studied the gestures of blind, sighted, and blindfolded sighted 10- through 12-year olds as they engaged in narration, direction giving, or conservation tasks. Found that blind children produced gestures, though not in all contexts in which sighted children produced gestures; and that blind children's gestures resembled sighted children's gestures…

Children between 7 and 11 years of age with moderate learning difficulties were tested for conservation. Nonconservers were divided into experimental and control groups. Experimental group children performed conservation tasks with conserving children in their class. Posttests indicated that the increase in performance in conservation tasks was…