The study examined the effectiveness of enhancing perceptual differentiation in the training of four developmentally delayed preschool children who were so low-functioning that they did not demonstrate oddity responding (ability to choose one distinct stimulus from a group of identical stimuli). Instead of the Arabic numerals used in the original…

The definition of development is discussed. (AH)

This study sought to assess the ontogenetic course of three classes of size-value phenomena. Size-value phenomena refers to the observation that valued and neutral objects physically equal in size are judged as unequal. Results are discussed in terms of perceptual development. (ST)

Suggests that the teacher who wants to lead children toward visual literacy and eventually to reading and writing skill must help children explore what they themselves perceive and how and why they perceive it. (TO)

A computer-displayed 3-D tic-tac-toe game was used to investigate adult perceptual biases in dealing with diagonal line orientations. Also investigated was the interaction between prior spatial ability and the effects of explicit visual modeling and structured practice on performance. Results indicated a strong selective difficulty in dealing with…

The thirteen chapters in this collection provide a detailed examination of visual perception and visual constancy. After a first chapter providing an historical overview of the field, the 11 central chapters present reports on current research from leading investigators. A final chapter brings into focus a variety of methodological, empirical, and…

Lowenfeld (1945) developed a series of six instruments which could be used to identify perceptual abilities. For this study, the visually oriented person was defined as the objective viewer of the environment, while the haptic person was defined as a person who uses the eyes only when forced to do so and relates to his environment subjectively. He…

An investigation of memory development using nonmetric multidimensional scaling. Judgments of similarities between complex objects were obtained from 5-year-olds and adults under two conditions: (1) when objects were simultaneously present at the time of comparison, and (2) when the objects were not simultaneously present and had to be compared on…

Research supported by Public Health Service Research Grant MH-11088 from the National Institute of Mental Health.

Study supported by a grant from the National Science Foundation, GB-5664.