Object substitution masking (OSM) is said to occur when a perceptual object is hypothesized that is mismatched by subsequent sensory evidence, leading to a new hypothesized object being substituted for the first. For example, when a brief target is accompanied by a longer lasting display of nonoverlapping mask elements, reporting of target…

Textons are elongated blobs of specific color, angular orientation, ends of lines, and crossings of line segments that are proposed to be the perceptual building blocks of the visual system. A study was conducted to explore the relative memorability of different types and arrangements of textons, exploring the time course for the discrimination…

Demonstrates that discrimination training with verbal materials (words and letters) is generally more helpful than training with non-verbal forms. (RB)

Reviews examples from the recent psychological literature relating to object orientation and constancy. The conclusion is reached that the attempt to separate the constancy and discrimination questions in an experimental design employing only a single dependent variable fails practically and theoretically. A theoretically more acceptable…

One method of computing the optimum size of lettering for slides and TV title cards. (Author)

Described is a system for evaluating a child's learning pattern. It is explained that the evaluation is based on a social history, visual screening (including acuity, functional skills, pursuit skills and binocularity skills), auditory evaluation, motor assessment, and academic testing. (CL)

Confirmed the hypothesis that those in the three-dimensional instructional group would make fewer confusion errors that those in the two-dimensional instructional group on a transfer task in reading. (RB)

To investigate the possible cue (stimulus) as opposed to motivational functions of drive and reward, this study assessed the effects of problem difficulty, reward magnitude, and drive level on the performance of rats in visual discrimination tasks entailing both choice and speed measures. (Editor/RK)

Suggests color highlighting as an effective method of improving word recognition visual discrimination skills. (RB)

Experiments showed that in verbal discrimination learning imaging the referent of the correct item was more facilitative than vocalizing the correct item, as long as the imagery structure was executed in the company of relevant motor activity. No difference between the two strategies was found in pictorial discrimination learning. (Author/BJG)

Based on PhD thesis submitted to Brown University (June 1967).

Research supported by the National Research Council (Grant APA-179) and the Medical Research Council of Canada (Grant MA-2653).