This study tests the following hypotheses: (a) the ability to solve disjunctive concepts increases with age; (b) positive instances are of greater use in solving conjunctive concepts while negative instances are of greater use in solving disjunctive concepts; (c) older children will show greater improvement than younger children in concept…

To determine to what extent children of preschool age comprehend the meaning of logical connectives, 64 5- and 6-year-olds were told to hand differently colored and shaped wooden blocks to an experimenter. The commands involved various English idioms used for conjunction (e.g. both black and round), disjunction (either black or round), and…

This study investigated developmental changes in semantic structure, focusing on whether changes could account for differences in the concepts acquired by children and those acquired by adults. Semantic structure was determined at each of four age levels (6, 9, 12 years and college students). Two indications of developmental change were observed…

This paper presents a theory of human information processing. Information processing refers to the perception, encoding, recoding, storage, retrieval and manipulation of information by the brain. This theoretical model takes a developmental perspective in explaining human performance on tasks that require thinking, reasoning and remembering.…

This study uses a search task to investigate the development of word superiority effects in visual perception. Subjects are kindergarten, second and fourth grade children, and college students. (CM)

Evidence is provided for gradual age (and, seemingly, cognitive developmental) changes in the acquisition of complex problem solving strategies. Differential performance as a function of exposure to a child-model exhibiting the best strategy also suggests the role of learning in strategy acquisition. (Author/MV)

Three experiments examine the information extraction process in adults and elementary school children reading paragraphs or words. In experiments 1 and 2 subjects were presented paragraphs to read and to search for specified targets. In experiment 3 subjects were asked to judge whether briefly presented pairs of letters were the same or different.…

Piaget's concept of socialized speech was reevaluated with the use of everyday preschool speech collected during free play on 174 boys and girls aged 2 to 5. (MS)

Presentation of a "natural experiment" problem situation to fourth, sixth, and eighth graders and college students revealed that not until adolescence could subjects isolate alternative or additive causes in a multivariable situation. (JMB)

Obtained self-reports of memory abilities and skills from 50 younger and 50 older adults. General rating questions and specific questions about memory for certain types of content were included. Consistent age-related decrements were found only for general questions, especially those assessing perceived changes over time. Less consistent…

Investigated relationships among metamemory, memory behavior, and memory performance of children aged 4 to 6 in two experiments. Results indicated an increase in preschoolers' ability to establish relationships between cues and targets even if these were not highly associated. (RWB)

Extends and replicates the 1948 Soviet study by Istomina that examined the age at which children use deliberate strategies to aid recall and the effect that task context has on remembering. Subjects were 3- to 7-year-old children. Istomina's results were not replicated in this study. (HOD)

A longitudinal study examined (1) development of relationship between physical maturation rate and cognitive performance as children become adolescent and (2) specific components of cognitive processing linked to physical maturation-related differences in performance on cognitive ability tasks. Differences were detected on cognitive process tasks.…

Compares performance of 172 children aged 7 to 13 years on tasks involving visual or auditory presentation of rhyming and nonrhyming letters and an oral or written response. Results indicate insensitivity to phonological similarity for young children with disabilities; sensitivity improves with age, but deficits in short-term memory remain at…

To better understand the development of noncompensatory strategy use for decisions involving social and nonsocial objects, a decision board technique was used to trace the information acquisition process of 88 second-, fifth-, and eighth-graders. Findings indicated that second-graders searched the decision board (a matrix with 24 squares of hidden…