Paper presented in part at the American Psychological Association Convention (San Francisco, California, 1968).

In a visual recognition masking experiment, a target stimulus to be identified is either preceded or followed by a second stimulus called a masking stimulus. The experiments described here provide estimates of both developmental and aging differences in visual backward masking under conditions which maximize interference in the central visual…

This study investigated the process of perceptual exploration and organization of children as a function of age and sex in two experiments. In Experiment I, 3- to 5-year-old children named the pictures of nine familiar objects arranged in 3 x 3 matrices (exploration tasks) and indicated preference for objects represented in pairs (pair-completion…

Evaluated were the properties and fine structures of averaged visually evoked potentials (AVEP) in 60 normal children between the ages of 2 and 9 years. Electroencephalographic recordings were taken while white diffuse flashes were used to deliver visual stimuli to the Ss. Three types of AVEP patterns were discerned, with no relationship observed…

Presents a study of perspective taking ability among children aged 3 to 7. The first task involved a classic block appearance task. In the second task, the child and/or the experimenter each wore different colored glasses and the child was asked to describe how a white card appeared to each of them. (BD)

Reports on a series of four experiments designed to determine more precisely the characteristics of the stage of visual feature analysis of word identification and to examine response competition factors in this interference task. (SB)

Dot patterns varying in type of symmetry (double, vertical and horizontal symmetry, and asymmetry) were presented tachistoscopically for 200 msec, followed by a patterned mask, to 16 subjects in each grade level: kindergarten, second, and fourth-grade. (Author/JH)

Reports the effects of exposing both kindergarten and elementary school children to high and low speed motion pictures on children's estimation of time. Concluded the children's judgment is dependent upon their chronological ages and daily experiences of visual perception. (CC)

A level prediction task, in the context of Piaget's conservation-of-liquid problem, was used to analyze the regularities of incompetence'' in the nonconserving or noncompensating child. (Author)

Results are discussed in terms of variables which may lead to the activation of cognitive structures during the transitional period. (Authors)

Older children had faster reaction times overall than did the younger children, and the difference between reaction times in the two experimental conditions was greater for the older children than for the younger children. (Authors/MB)

Reports replication and extension of Elkind and Weiss's study of perceptual exploration using 122 Israeli children. In general, results were upheld and reflected the influence of school experiences seen most specifically in the right-left directionality expected to result from learning to read Hebrew. (WY)

In order to determine whether mistakes committed by younger children are the result of retention mistakes rather than faulty perceptual encoding, twenty children (6, 8, 10, and 12 years old) reconstructed two visual patterns from immediate memory, while twenty other children (5 and 6 years old) reconstructed the identical patterns by direct…