In a classification task, preschoolers matched a target stimulus with a conventional category, a visually similar item that cut across conventional categories, or an unrelated item. Items were presented in picture, verbal, and picture-verbal conditions. In all conditions, conventional classifications outnumbered visual ones, and this difference…

Investigates the perceptual basis of metaphor by asking 5-, 7-, and 10-year-old children and adults to pair and discuss films of natural objects, both stationary and moving. Concludes that motion information makes metaphoric similarity relatively easy to perceive and influences the form of descriptive metaphors. (Author/CB)

Assesses preschoolers' and adults' relative ability to solve classification problems in which a similarity criterion is the only criterion appropriate for solution. Also investigates effects of the salience of individual dimensions on solution-relevant similarity classifications. (AS)

Infants were tested in three studies of the acquisition and long-term retention of category-specific information. Results document retention of category-specific information after intervals of two weeks. (PCB)

Students in grades two, four, six, and college sorted abstract visual patterns that varied both in amount of contour and in type of visual organization (unstructured, simple symmetries, multiple symmetries, and rotational). Results suggested that children attend to both amount of contour and visual organization, but that attention to visual…

Preschool children's evaluation and integration of visual and auditory information in speech perception was compared with that of adults. Results were used to test current views of the development of perceptual categorization and speech perception. (Author/RH)

Tests the hypothesis that habituation of attention to irrelevant information can account for within-task improvement in selective attention--that children who are preexposed to stimuli that will later be irrelevant in a speeded classification task will experience less interference than children not given the opportunity to habituate. (HOD)

Five young adult females with mild mental retardation were given match-to-sample training to develop four classes of equivalent stimuli. All subjects demonstrated development of all possible equivalence classes involving these stimuli. For four of five subjects, the classes that included auditory stimuli developed more rapidly than those that did…

Two experiments with 167 first-, third-, and fifth-grade children revealed age-related changes in the composition of natural categories. Categorization was investigated via perceptual similarities of objects and conceptual similarities of superordinate classes. The free-classification paradigm (Garner, 1974) was adapted to natural categories,…

Reports two experiments showing a possible developmental shift from memory organization based on associative criteria to an organization based on categorical criteria. Children in first, fourth, and seventh grades were given a sort/recall task with items that could be organized into groups of categorical or associative pairs. (Author/CB)

Examines traditional psychometric approaches to measuring intelligence and recent work by cognitive psychologists to develop a rationale for a non-verbal reasoning test for 10- to 11-year-olds. Recent studies providing basis for analyzing structure of test items are outlined, and benefits of analyzing items at a sub-type level are discussed.…

Two experiments investigated perceptual primacy of dimensional and similarity relations in stimulus classifications of younger and older subjects. Results support a differential-sensitivity view of perceptual development which asserts that individuals at all ages primarily perceive and use separate relations. (RWB)