Investigates the effects of predisposed and distinctiveness-based salience on children's classifications in 96 preschoolers and fifth graders given a classification task designed to reflect a developmental shift from integral to separable perception. (Author/MP)

The study sought to determine whether 100 emotionally disturbed, mentally retarded Ss assigned four distinct diagnostic labels could be differentiated from each other on the basis of sex, age, degree of mental impairment, and adaptive behavior. (Author)

A grouping task revealed a chronological progression: color and form determined the 4-year-old children's grouping about equally; form dominated in the 5-year-olds; and 9-year-olds grouped primarily by conceptual attributes. Performance on a memory task showed the developmental shift from color to form to concept, while cued recall showed…

In order to study developmental and task-related factors in ability to coordinate two dimensions, a simple multiplicative relations matrix task was presented to 51 children in kindergarten and grades 1 and 2. (MS)

Two experiments studied the impact of the nature of information available at different processing levels on differences in haptic (tactile) and in visual, free classification development. Found that exploration characteristics (involving simultaneous versus independent processing of stimulus dimensions) and presentation of the stimulus dimensions…

Three studies explored whether children's tendency to extend object names on the basis of sameness of shape (shape bias) is specific to naming. Findings indicated that 2- and 3-year-olds showed shape bias both when asked to extend a novel name and when asked to select an object of the same kind as a target object; 3-year-olds also showed shape…

Verbal and figurative classification tasks were presented to 30 blind and 30 sighted children (ages 6 to 11). Although younger blind children were significantly less efficient on tasks, older ones reached or were close to the level of their sighted peers. Analysis illustrates how the blind children adjusted their conceptual knowledge to their…

Examined qualitative developmental change in the use of category organization between ages 8 and 10 and the supportive functions of task environment and category knowledge in this development. Results support the hypothesis that most 10 year olds are capable of strategically activating category knowledge in appropriate task environments when items…

In one experiment, second and fourth graders used more categorical information when they made inferences than did preschoolers. In two other experiments, second graders, but not preschoolers, distinguished between categorical information and appearance when they made inferences about known concepts and familiar properties. (BC)

This review of studies of early onset schizophrenia examines the nosological similarity between adult and early onset schizophrenia, differential diagnosis, treatment, and the extent to which children and adolescents diagnosed as having schizophrenia using adult criteria have the characteristic adult correlates. The paper discusses gender…

Data from 48 infants revealed (1) that infants aged 1;2-2;3 failed to establish a stable word-object link even in follow-in labeling and (2) that only infants aged 1;6-1;7 could identify the correct referent during discrepant labeling. During the period between 1;2-1;7 infants are becoming increasingly adept at acquiring new labels under minimal…

Assessed semantic priming for category coordinates and function-related words in children with good or poor reading comprehension, matched for decoding skill. Found that both groups showed priming for function-related words, but poor comprehenders showed priming for category coordinates only if the pairs shared high-association strength. Good…

Investigated 7-year-olds', 9-year-olds', and adults' ability to classify children's and adults' faces by sex using only biological based internal facial structure. Found that participants categorized adult faces by sex at accuracy levels varying from just above chance (7-year-olds) to nearly perfect (adults). All groups were less accurate for…

This study examined effects of individual differences in speak-span scores and variations in memory demands on class-inclusion performance of 10-, 13-, and 15-year-olds. Results from regression analyses and the mathematical model indicated that differences in age, speak span, and memory load affected performance. Effects of speak span and memory…

Two experiments examined toddlers' noun vocabularies and interpretations of names for solid and non-solid items. Results indicated that one side of the solidity-syntax-category organization mapping was favored. Seventeen- to 33-month olds do not systematically generalize names for solid things by shape similarity until they already know many…