Stroop dilution is the reduction of the Stroop effect in the presence of a neutral word. It has been attributed to competition for attention between the color word and neutral word, to competition between all stimuli in the visual field, and to perceptual interference. Five experiments tested these accounts. The critical manipulation was whether…

The traditional explanation for dual-task interference is that tasks compete for scarce processing resources. Another possible explanation is that the outcome of the processing required for one task conflicts with the processing required for the other task. To explore the contribution of outcome conflict to task interference, this paper describes…

Six-month-old African-American infants' expectation of a visual stimulus was related to developmental measures. Reaction time was related to eye fixation in tests that measured visual recognition memory (VRM) and presented objects of different shapes to the infant. Reaction time and infants' stimulus expectation predicted VRM novelty preference.…

In two experiments subjects were required to determine whether a random, angular form, presented at any of a number of picture-plane orientations was a "standard" or "reflected" version. Average time required to make this determination increased linearly with the angular departure of the form from a previously learned orientation. (Author/BJG)

The spread of encoding concept was tested visually by having subjects view pictures which varied in contour completeness. The hypothesis was supported that as contour completeness decreased, the amount of perceptual analysis and memory performance would increase. (Author/MH)

A comparison of test results on the Visual Discrimination Test was made between a group of 22 reading disabled children and 22 children who were reading on or above grade level. Both groups were of average or above-average intelligence and the two groups were matched for age and sex. The mean age was 10 years and 3 months and all the reading…