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…

Concludes that the Bieger Test is thorough in the diagnosis of visual discrimination deficits. (FL)

This report discusses the current state of research into the visual effects of screen layout design, i.e., the arrangement of design elements on a screen. First, two types of design elements are described: technical (those things that engineers work with and that users have little or no control over), and comprehensibility (those elements that a…

This discussion of factors involved in the presentation of text, numeric data, and/or visuals using video display devices describes in some detail the following types of presentation: (1) visual displays, with attention to additive color combination; measurements, including luminance, radiance, brightness, and lightness; and standards, with…

Strategic differences in spatial tasks are explained in terms of different cognitive coordinate systems that subjects adopt such as standard versus arbitrary, task-defined axes. A theoretical account of mental rotation of individuals of low and high spatial ability solving problems from psychometric tests is instantiated as computer simulation…

A systematic research program will study the cumulative effects of selected instructional variables on learning a spatial visualization task. The goal of the research is to identify instructional variables that will improve the performance of female students on the Aircraft Instrument Comprehension (AIC) test. The AIC program is intended to teach…

The construct of spatial ability is discussed and it is suggested that some widely used and cited tests that are called spatial ability tests may not be valid measures of that ability. Instead, their items may be solved using mental processes that are clearly analytical and not spatial in nature. Four studies involving the analysis of subjects'…

The document attempts to integrate aspects of two lines of research relating to picture recognition and the comprehension of pictorial space. It also describes an empirical study carried out in Nepal which tested rural adult subjects' understanding of topological, euclidean, and projective concepts in regard to real objects and to pictures. The…