Crowding refers to impaired target recognition caused by surrounding contours. We investigated the development of crowding in central vision by comparing single-letter and crowding thresholds in groups of 5-year-olds, 8-year-olds, 11-year-olds, and adults. The task was to discriminate the orientation of a Sloan letter E. Single-letter thresholds,…

A sample of 176 students in grades 2-12 were tested for visual acuity as a function of minimally resolvable red, yellow, green, and blue lines. (Author/JMB)

Younger (N=30) and older adults (N=30) performed the picture completion and picture arrangement subtests of the Wechsler Adult Intelligence Scale under three conditions of stimuli size: standard, larger than standard, and smaller than standard. Size of stimuli did not influence the test scores of younger or older adults. (Author)

Tests the hypothesis that children will be better than adults at perceiving depth at large disparities in random-dot stereograms. Subjects were 4, 6, 8, and 25 years of age, with six males and six females in each of the four age groups. (MP)

The sighting dominance and acuity of second-, fourth-, and seventh-grade children, and of college students were measured. Results showed a right versus left sighting dominance occurring in a ratio of 2:1 at each age. Patterns of acuity dominance also remained constant across grades. (Author/JMB)

Replication of a study that showed that deaf 15- to 18-year- olds could accurately identify a significant number of isolated signs presented well out in peripheral vision found that 8- to 12-year-olds could also identify such signs, although results showed a significant effect of age on performance. (Author/CB)

A 1975-76 Swedish study of 643 handicapped persons born in 1918 or earlier and a follow-up study conducted 5-8 years later found a higher mortality rate than the general mortality in the same age group. Population changes are described, focusing on institutionalization, need for services, functional level, hearing, and vision. (Author/JDD)

No significant decline in performance occurred before age 50. Decline in Memory-For-Designs Test performance after age 60 is sufficient to suggest caution in the use of the test for evaluation of brain damage in the older patient. (Author)

Visual fixations were recorded in newborn, 4-, and 8-week-old human infants as they scanned displays that varied in contour length, size, number, and a new metric, CVAL (based on Contour Variability, Amount and Location). One of the findings was that both contour length and CVAL separately accounted for approximatel1 95 of looking-duration…

Witkin's Embedded Figures Test (EFT) was used to measure the changes with age in field dependence and problem-solving ability. Qualitative data concerning problem-solving strategies and quantitative data were collected. EFT was administered to 12 females in each of the following decades: 20s, 30s, 40s, 50s, 60s, 70s. All subjects were moderately…