Examined the types of play mothers introduce in direct response to their toddlers' play and the actual maternal play behaviors. Findings suggested that mothers tend to play with their toddlers in ways that might promote their children's development and that mothers with more knowledge about play development provide their children with…

Three studies used interspecies adoption stories to examine children's understanding of the role of birth in determining animal properties and species identity. Found that most 4- to 7-year olds could reliably judge that babies would be of the same species as birth parents, but were unable to attribute properties of adoptive parents. (Author/KB)

Fifty-eight adults with Down syndrome were assessed longitudinally over 10 years for the purpose of modeling aging-related change in cognitive function and adaptive behavior. Findings provide further evidence of changes in performance with age and include selected effects for participants who completed the study and those lost to follow-up.…

This article presents evidence of the reliability and validity of a new paper-and-pencil test of proportional reasoning, Paper-and-Pencil Balance Beam Test. A Total of 627 individuals, aged 8-47, participated in the 3 studies discussed. Results support previous research which correlates performance on proportional reasoning problems with…

Social-cognitive modes of play and peer responses were observed in two classrooms of 40 three-year-olds, two classrooms of 32 four-year-olds, and two classrooms of 36 three- and four-year-olds. Developmental differences appeared in play patterns in same-age but not in mixed-age classrooms. (TJH)

Validated models of mental addition processing by testing children and adults in a production task paradigm. Examined individual-difference relations between strategy choice parameters and criterion-related measures of ability. Found that individual differences in the apparently calculative processes that underlie numerical facility are highly…

Studied changes in prejudice toward blacks and Native Indians among white children between ages six and nine. Found that older children were less prejudiced than younger children. Favorable-white and unfavorable-black evaluations did not decline with age, but unfavorable-white and favorable-black evaluations increased with age, and counter-bias…

Conservation and metaphor acquisition were studied in 35 hearing-impaired children (ages 6-19) using either cued speech or oral-aural communication. Significant positive relationships were found between conservation and metaphor in both communication modes, age and metaphor, and age and conservation. Neither conservation nor metaphor was related…

Tested the Watson and Busch model of how children learn LOGO programing. Investigated second- and fifth-grade students' stage of cognitive development, stylistic preferences, and strategy usage. Field-independent children showed a marginal advantage over field-dependent children in learning to program in LOGO. (MM)

Examined the accuracy with which parents judged their children's preferences, and the relationship between parental accuracy and children's cognitive performance. Mothers were more accurate than fathers; parents of fifth graders were more accurate than parents of second graders. The accuracy of parents' predictions was related to children's…

Differences in component processing skills of students of different ages and developmental changes over 1 year were studied for 96 students in grades 2 through 4 and 59 of them in a follow-up. Results trace the development of component processing skills and suggest a theory of the development of component skills. (SLD)

Reviews research relevant to children's understanding of pervasive, naturally occurring individual differences in thoughts and beliefs. Identifies developmental changes for each form of understanding: false belief, origins of knowledge, ambiguity, explicit judgments of knowledge, communication, and information seeking. Argues that considering…

Four studies examined developmental differences in the representation of basic-subordinate inclusion relationships in three-, five-, and seven-year olds and undergraduates. Found that even three-year olds showed rudimentary knowledge of the asymmetry of inclusion. There was a marked developmental gap between producing subordinate category names…

Compared kindergartners', third graders', and undergraduates' understanding and attribution of randomness. Found that kindergartners' interpretations were deterministic or outside the determinancy-indeterminancy frame. Most third graders had some grasp of randomness; their interpretations were less dominated by false attribution of determinism…

Compared adolescents' (14 to 20 years) and young adults' (21 to 37 years) wisdom-related knowledge and judgment related to difficult and ill-defined life dilemmas. Rated responses along five wisdom criteria. Found that adolescents performed at lower levels than young adults but also demonstrated substantial age increments in performance.…