Post-formal operational thought is characterized by both relativism and dialecticism. To examine age differences across adulthood in relativistic and dialectical thought, and to determine whether formal operations are necessary but not sufficient for these forms of thought, 20 young (mean age, 19.6), 20 middle aged (mean age, 46.2), and 20 older…

Investigates, using eight scenarios, children making inferences about memory from incomplete knowledge and children varying in what they judge as relevant information in their schema. Showed that older children are less likely than younger ones to invoke an inferential schema when making memory judgements. (Author/BB)

Reports results of 14 studies on children's knowledge about thinking. Suggests that preschoolers appear to know that thinking is an internal mental activity that can refer to real or imaginary objects or events. However, preschoolers are poor at determining when a person is and is not thinking. This shortcoming is considerably less evident in…

Provides evidence for the utility of schema-based frameworks which assume that schemas and scripts organize information, aid in comprehension, and guide information retrieval. (FL)

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…

Investigated development of reasoning about the teaching of values in school and family contexts among 8-, 10-, and 13-year olds and college students. Found that children and young adults' reasoning is multifaceted and distinguishes between moral values that reflect justice, rights, and moral character traits and other forms of desirable…

Two experiments investigated kindergarten through fourth-graders' and adults' ability to evaluate the certainty of deductive inferences, inductive inferences, and guesses, and explain the origins of inferential knowledge. Findings indicated that children rated their own deductions as more certain than guesses, but when judging another person's…

Tested children with apparatus that dropped balls through clear or opaque interwoven tubes. Found that older children could solve configurations with greater number of tubes than younger children. Success with clear tubes did not transfer to opaque tubes. Significantly, errors were consistently directed to location directly below ball's last seen…

This study examined whether scripts provide a basis for the categories preschool children use to structure their semantic memories and whether the use of taxonomies to structure memory becomes more common only after children enter elementary school. Subjects were 108 children in three equal groups of 18 boys and 18 girls children each of 4-, 5-,…

Analysis of a large corpus (80 pairs of speakers) of 7-12 year olds suggests that 2 principles underlie the development of dialogue coordination skills. The seven to eight year olds establish a limited common dialogue lexicon, whereas older speakers show evidence of deep coordination processes aimed at establishing mutual intelligibility of a…

Examined the effects of print exposure on growth of declarative knowledge and vocabulary in 133 college students and 49 elderly adults. Compared groups on two general knowledge tasks, vocabulary, working memory, syllogistic reasoning, and print exposure. Found that exposure to print was a significant predictor of declarative and vocabulary…

An analysis of children's narrative composition and art revealed concurrent development at both a general structural level and at a fine-grained detail level. A three-part study investigated whether this general cognitive pattern would be maintained across a different range of tasks: literary composition, scientific reasoning, and working memory.…

The estimation processes used by fifth through eighth grade students as they responded to computational estimation test items were examined. Interview-based process descriptions were cross-validated using large group test data from an open-ended test and a multiple choice test. Five question formats were used to test different estimation…

Two naturalistic research studies observed 45 eleventh grade students carrying out research paper assignments, and a third such study focused on 26 third grade students. The studies took place in Alberta (Canada) in 1993, Texas in 1996, and Washington state in 1999. From data analyzed in the interviews and written documents, the initial findings…