The influence of frequency of occurrence of a visual stimulus on encoding processes is investigated, to discover what mechanisms allow cognitive processes to modify perceptual processes. Six experiments are described and the results are discussed. (MH)

Tests the hypothesis that children will be better than adults at perceiving depth at large disparities in random-dot stereograms. Subjects were 4, 6, 8, and 25 years of age, with six males and six females in each of the four age groups. (MP)

The ability of neonates to integrate auditory and visual information into a single percept was investigated using a signal detection methodology. Thirty-two infants ranging in age from 2 to 11 days served as subjects. (Author/MP)

Demonstrates that a representation of a figure through object reconstruction is prerequisite to recognizing the object figure from a collection of figures, which in turn is prerequisite to representing the object figure using a pencil-and-paper reproduction. (RL)

After learning to discriminate tactually between a convexity and a concavity, 101 children aged three to eight years were presented a photograph of the convexity and the concavity. The relevance of egocentric, environmental, and lighting-specified frames of reference was manipulated by changing the position of the subject's head, rotating the…

The results suggested that profoundly retarded children do show habituation and dishabituation to visual stimuli and are actively storing and processing information about their perceptual world. (Author/DLS)

A discussion of Edwin Land's experiments with color images from black-and-white photographs. Information is presented for duplication of these experiments by the amateur photographer. (BB)

Defines holography, identifies visual factors in driving and the techniques used in on-road visual presentations, and presents the design and testing of a holographic system for driver training. (RAO)

Visual pattern preferences were established for 96 9- and 13-week-old infants using stimuli varying in contour density presented either at a low, moderate, or high luminance level. Age differences in the maximally preferred patterns across stimuli and luminance levels indicated that luminance interacts with contour density in determining stimulus…

The ability of forty 8-week-old infants to discriminate between projected-stereograms with and without retinal disparity was tested with an habituation-dishabituation paradigm. Results were interpreted as indicating that the infants could discriminate between stimuli when the only difference between them was binocular disparity. (MS)

Evaluated with a total of 60 primary-grade children was the effectiveness in improving ocular motor control of three training programs: the Bender proprioceptive facilitative feedback exercises, the Marsden ball program, and perceptual exercises. (DB)

This article is concerned with the perceptual load in searching for a number of kinds of target which are presented for a fixed, short period of time. The aim is to establish data which any acceptable model of human information processing will need to fit. (Author)

Considers whether any sort of orthographic mechanism is used by fluent readers. (Author/RK)

Two initial experiments demonstrated that direction aftereffects of potentiation in the extraocular muscles (induced through sustained versional rotation to the side) generally increase as a function of the magnitude and duration of the inducing ocular rotation and can be built up under conditions of varied as well as constant fixation. (Editor)