Investigates the evidence that the imperfect performance in forward search of 36 children aged four and five years resulted from unstable execution of the correct component processes. Evidence suggests that five-year-olds engaged in forward search, but four-year-olds used only a rudimentary form of forward search. (RJC)

Four experiments studied 4- to 6-year-old children's understanding of inferential reasoning as a source of knowledge. To assess understanding that knowledge of relevant premises leads to knowledge of the conclusion, children had to judge the knowledge of another person, who was presented to the child as being aware of two premises. (Author/BN)

Maintains that there are core-specific and non-core-specific domains of knowledge, but that only the core-specific domains benefit from innate skeletal structures. Asserts that core skeletal domains are universally shared, even though their particular foci may vary. Emphasizes that individuals vary in terms of the noncore domains they acquire.…

Maternal involvement effects on symbolic play development in toddlers were investigated. Sixteen mother-child dyads were observed at bimonthly intervals in a free-play setting during the period from 20 to 28 months of age. The complexity and length of play episodes increased when the mother was available to play with the child. (Author/BN)

Ability to identify the sexes, understanding of gender group membership, temporal stability of gender, and gender consistency over situational changes were assessed in a sample of 61 boys and girls of 3-5 years of age. Findings suggested that only a rudimentary understanding of gender is acquired by children before the sex-typing process begins.…

The perceived spatiotemporal continuity of objects depends on the way they appear and disappear as they move in the spatial layout. This study investigated whether infants' predictive tracking of a briefly occluded object is sensitive to the manner by which the object disappears and reappears. Five-, 7-, and 9-month-old infants were shown a ball…

Two experiments examined whether the correlation between advances on theory-of-mind and executive function tasks results from the tasks posing the same executive demands among 3- to 6- year-olds. Findings indicated that performance on the dimensional change card-sorting task (a measure of executive function) was correlated with performance on the…

This study examines frequency, overlap, and genetic and environmental influences on sleep difficulties, which are understudied in school-aged children. The Sleep Self Report and the Children's Sleep Habits Questionnaire were completed by 300 twin pairs (aged 8 years) and their parents. Child report suggested more frequent sleep problems than…

Conducted a meta-analytic review of 41 studies to explore the relation between children's aggressive behavior and hostile attribution of intent to peers. Found a significant association between hostile attribution of intent and aggressive behavior, with larger effects associated with more severe aggressive behavior, rejection by peers as a…

Two studies investigated the effect of language input on theory of mind by comparing the performance of deaf native-signing children (ages 4 to 8) raised by deaf signing parents and deaf late-signing children raised by hearing parents on "thought picture" measures of theory of mind. Findings indicated that deaf late signers showed…

Proposes that conceptual change is constrained by the child's conceptual structures and the structures inherent in problem-solving tasks. Uses a microgenetic case study and group data to examine how interaction between strategies children bring to a task and the detailed task structure redirect children's attention and create the possibility of…

Examines the development of metaphor by using structure-mapping theory to make distinctions among kinds of metaphors. Proposes that children can understand metaphors based on shared object attributes before those based on shared relational structure. Results indicate a developmental shift toward focus on relational structure in metaphor…

First-, third-, and fifth-grade students saw matters involving intellectual conventions and personal preference as more variable across time and space than matters involving logic and physical laws. Furthermore, intellectual conventions were seen as legitimately changeable by social consensus and school authorities, but not on the basis of…

Examined the development of teaching skills in older siblings responsible for teaching their younger siblings to become competent members of their culture among children from a Zinacantec Maya village in Chiapas, Mexico. Found that by age 4, children took responsibility for initiating teaching situations with their younger siblings, and by 8,…

Two experiments compared 10-year-olds' and adults' ability to choose positive and negative diagnostic tests over positive and negative nondiagnostic tests. Findings indicated that both age groups were more likely to prefer positive diagnostic tests over positive nondiagnostic tests, although only adults showed a significant preference for negative…