A central theoretical issue is that of the cognitive status of imagery. Detractors emphasize the merely-sensory aspects while proponents emphasize the also-symbolic aspects. Examined with reference to this issue are the theories of Piaget and Bruner, recent studies of concept learning and representation, and studies related to the Craik and…

A theory for representation of concepts in memory is proposed which emphasizes the association of salient exemplars with the concept. Previous theories dealing with the classification processes involved in acquiring new concepts have shown that clear category boundaries do not exist. It is proposed that present theory must account for the…

This investigation examined in the laboratory the type of learning commonly found in the school situation--the formalized acquisition of concepts. A verbal concept-learning task suitable for college students was devised which permitted the externalizing and quantifying of behavior at 6 points in the learning process. A pilot study evaluated the…

The "property-set model" is proposed for concept learning and subsequent recognition and classification of old and new exemplars. In an experimental evaluation of alternative models, the property-set model was the best predictor of both recognition and classification performance. (Author/RM)

Eight experiments are described in this report. In experiment 1, four and five year olds were presented four verbal discrimination (VD) lists. For three of the lists all correct items were either conceptually, acoustically, or affectively similar. The fourth was a control list. The conceptual list facilitated VD learning. Experiment 2 indicated…

A verbal concept-learning task permitting the externalizing and quantifying of learning behavior and 16 ability tests were administered to female graduate students. Data were analyzed by alpha factor analysis and incomplete image analysis. Six alpha factors and 12 image factors were extracted and orthogonally rotated. Four areas of cognitive…

To determine whether different long-term memory representations are necessary for verbal and visual material, subjects studied faces composed of visual features or verbal facts composed of concepts. Findings showed interference between verbal and pictorial information, and supported the ACT theory that pictorial and verbal materials are stored…

The extent to which pictorial presentation would facilitate the comprehension of text-like passages among two populations of fourth-grade students was investigated. Subjects were 64 students each in high-socioeconomic status (SES) white and low-SES black groups. Simple passages amenable to pictorial presentation were read over a programed tape to…

The fan effect (the difficulty in retrieving any one fact after learning many about a concept) occurs only when the facts with repeated concepts are stored as independent episodes. It tells us nothing about the code formed by a pattern of interconnected concepts. (Author/CP)