Recent work has shown that perceptual training can be used to improve the performance of novices in real-world visual classification tasks with medical images, but it is unclear which perceptual training methods are the most effective, especially for difficult medical image discrimination tasks. We investigated several different perceptual…

Visual expertise covers a broad range of types of studies and methodologies. Many studies incorporate some measure(s) of observer performance or how well participants perform on a given task. Receiver Operating Characteristic (ROC) analysis is a method commonly used in signal detection tasks (i.e., those in which the observer must decide whether…

Object parts are signaled by concave discontinuities in shape contours. In seven experiments, we examined whether 5- and 6 1/2-month-olds are sensitive to concavities as special aspects of contours. Infants of both ages detected discrepant concave elements amid convex distractors but failed to discriminate convex elements among concave…

A theory on the features of a visual scene and how these features are organized to provide a representational model of the visual scene is presented. (HB)

A discussion of visual field, foveal and peripheral vision, eye fixations, recognition and recall of pictures, memory for meaning of pictures, and the relation between speed of presentation and memory. (Editor)

Investigates preschool children's ability (n = 30) to discriminate age, and subject's use of different facial areas in ranking facial photographs into age order. Results indicate subjects from 3 to 9 years can successfully rank the photos. Compared with other facial features, the eye region was most important for success in the age ranking task.…

This article is reprinted from "Seven Magazine, a student publication of the University of North Iowa.

Four experiments assessed converging aspects of four-month-old infants' perceptions of visual patterns. Results together corroborate and extend previous findings that vertical symmetry has a special status in early perceptual development and that infants can perceive pattern wholes. (Author/AS)

THE LABELING AND DISCRIMINATION OF COLORS WERE STUDIED IN CHILDREN WITH PRIMARY READING RETARDATION AND IN A MATCHED GROUP OF NORMAL CHILDREN. TEN MALE STUDENTS IN MICHIGAN REPRESENTING AN AGE RANGE OF 9 YEARS 10 MONTHS TO 14 YEARS 10 MONTHS WERE CHOSEN AS SUBJECTS. DEVELOPMENTAL, MEDICAL, EDUCATIONAL, NEUROLOGICAL, PSYCHIATRIC, AND PSYCHOMETRIC…

Human recognition behavior is influenced by the phenomenon of shape constancy, which occurs when the shape of an object is correctly perceived regardless of the orientation of the object in space. The research reported here tests the validity of the shape-slant invariance hypothesis, a theoretical formulation of the phenomenon of shape constancy.…

Presents findings of a study on the visual perceptual dimension of cognitive structure as it relates to achievement in college biology. Results indicate a possibility of using visual recall probes for the early detection of learning differences related to achievement. (SL)

Appraises current explanations of how visual processing occurs. Highlights the basics of simultaneous and serial levels of processing. Discusses the results of a series of experiments on visual-search tasks and also on the role of prior knowledge in processing. (ML)

Describes experiments which focus on the perception of three dimensions. Discusses the cues about distance and depth and the role they have in perceptions of three dimensions. Evaluates the effect of color on the illusion on depth. (ML)

This bulletin is a compilation of papers dealing with the role of perceptual functions in reading and reading difficulties that were delivered at the 1966-67 Convention of the International Reading Association. Various sections are devoted to discussions of and reports of research on such matters as the auditory and visual modalities in reading,…

Examines the perception of components of written and spoken codes of human communication from a broad perspective in an attempt to identify possible similarities. (GT)