To examine the relationship between visual attention in infancy and the stimulus variables of contour and numerosity, 2- and 4-month-olds were placed in three experimental conditions. The results showed that contour and numerosity, acting in tandem, are responsible for the age-complexity shift observed by previous investigators of infant…

In an evaluation of the relation between dimensional salience and preschoolers' judgments of bigness, 3-year-old children were shown triads of rectangles and asked to select the "big" one. The biggest rectangle in each triad was neither the tallest nor the widest. (JMB)

Reports on three experiments involving 300 six-year old children that investigated the conditions under which young children would produce "separates" as opposed to partial occlusion drawings. (HOD)

The effects of stimulus dimension and mode of exploration on preschool children's responses to pattern meanings and unusual uses tasks of original thinking were studied. The 3D tasks generated more responses overall. Visual and haptic exploration combined with 3D was the only condition studied to meet all criteria for construct validity.…

This study followed the development of visual preferences in a single infant from birth to 10 weeks of age. The stimuli used were 5 x 10 item arrays of squares of lines in which a 3 x 3 target matrix of the other figure type (line or square) was embedded. The direction of first fixation and the total time spent looking at each side were determined…

The present experiment investigated the impact of contextually trained discriminations on gambling behavior. Nine recreational slot-machine players were initially exposed to concurrently available computerized slot machines that were each programmed on random-ratio schedules of reinforcement and differed only in color. All participants distributed…

Purposes of this study are to determine the effects of (1) preassessed dimensional salience upon performance in a bi-dimensional matching task, and (2) pretraining conditions expected to facilitate bi-dimensional processing. An additional aim was to elucidate a model of development involving changing salience hierarchies by comparing the effects…