A linked perceptual class consists of two distinct perceptual classes, A' and B', the members of which have become related to each other. For example, a linked perceptual class might be composed of many pictures of a woman (one perceptual class) and the sounds of that woman's voice (the other perceptual class). In this case, any sound of the…

Tries to unravel some of the problems concerning the previous finding that increasing the number of depth cues in pictures has a depressing effect on spatial accuracy of three dimensional reconstruction of pictures. Evidence does not support a deficiency in perceiving pictorial depth in African children. (AM)

This document reports on a study of how the eye and the hand become functionally coordinated during growth. A specific question researched is "How do children use their hands as perceptual tools for exploring objects in order to acquire information about them?" It was assumed that a pre-school child would have evolved a form of eye-hand…

Videotapes were made of the prehensile activity and looking behavior of 2- and 5-month-old infants in the presence of objects placed within and beyond possible contact distance. (BRT)

Three experiments investigated discrimination and memory of 5.5-month-olds for videotapes of women performing different activities (blowing bubbles, brushing hair, brushing teeth) or static displays after a 1-minute and a 7-week delay. Findings demonstrate the attentional salience of actions over faces in dynamic events to 5.5-month-olds. Findings…

Describes observer-based technique for assessing auditory capacities of infants from three to 12 months of age. This technique, referred to as the Observation-based Psychoacoustic Procedure (OPP), combines features of the Forced-choice Preferential Looking Technique and of the Visual Reinforcement Audiometry. Pure-tone detection and frequency…

Recent studies have suggested that unusual visual processing in autism might stem from enhanced visual discrimination. Although there are also many anecdotal reports of auditory and tactile processing disturbances in autism these have received comparatively little attention. It is possible that the enhanced discrimination ability in vision in…

A STUDY, IN PROGRESS, IS ATTEMPTING TO DETERMINE THE INTERACTION OF VARIOUS REWARD CONDITIONS AND VARIOUS TYPES OF PRESCHOOL EXPERIENCE WITH DISCRIMINATION LEARNING. THE SUBJECTS ARE 240 4- AND 5-YEAR-OLD CHILDREN WITH THREE TYPES OF PRESCHOOL EXPERIENCE--1 TO 3 MONTHS OF HEAD START, 10 TO 12 MONTHS OF HEAD START, AND NO ATTENDANCE IN A PRESCHOOL…