Training improves the ability of human observers to discriminate between two similar directions of motion. This gradual improvement is specific to the direction on which an observer is trained, enduring for several months. Improvement does not affect motion perception generally, nor does it depend on recognition of details of the movement. (Author)

The effects of varying training settings and objects on the development of skill generalization were studied with 60 retarded students (5-16 years old). Research procedures were identical for all groups except for the manipulation of settings and objects. A factorial analysis of covariance supported the prediction that the visual discrimination…

The hypothesis that perceptual development proceeds from less to greater dimensional separability was tested by giving a speeded classification task to first and fourth graders. Results supported the hypothesis that development proceeds toward greater flexibility of attention rather than simply toward increasing separability. (Author/DB)

Differences in response of four- to seven-month-old infants to tachistoscopically presented photographs of two human faces suggest infants were able to remember a frequently presented face from trial to trial and discriminate it from a discrepant, infrequently presented face. Findings suggest event-related brain potential (ERP) responses could…

Contrast thresholds for sine-wave gratings of spatial frequencies of 2, 4, 12, and 16 cycles per degree were determined for normal and disabled readers at a range of stimulus durations. The differences in sensitivity pattern across spatial frequencies was greatest at stimulus durations approximately equal to fixation durations during reading.…

Supports the hypothesized distinction between Mongol children's visual-motor performance and their correctly perceiving visual designs. (Author/RL)

Reports a series of studies that investigated the role of parafoveal vision in reading by using the Stroop phenomenon. Supports the "peripheral search guidance" process of Hochberg's model of reading, and provides evidence of processing variations across retinal location. (RL)

The experiment compared the visual sensory sensitivity of six deaf and six hearing Ss (mean age 11.2 years) in a signal detection paradigm. Ss were required to give forced-choice responses to a brightness discrimination task under three stimulus probability conditions. (Author/PHR)

The initial learning and subsequent transfer of an oddity principle by 50 children between 4 and 5 years of age were studied. The initial standard oddity problem was learned quickly by most of the children. A high level of performance was maintained on both transfer sets. (MS)

Presented 9-month-old infants with slides of drawings of pigs and rabbits, and tested the relative success of two auditory accompaniments in facilitating subsequent categorization of the slides. Found that infants paid more attention to presentations when they were accompanied by sound (words or tones) rather than musical tones, and paid more…

Studied drawing strategies used by children ages 2 to 4 in Singapore nurseries and kindergartens using experiments and naturalistic observation. Found that during period when children are supposedly "scribbling," they make systematic investigations of visual structure and develop a cluster of representational strategies involving patches…

Visual scanning behavior and efficiency of 22 children with visual disabilities and 25 children without disabilities (ages 3.5 to 10 years) were studied. Significant differences were found between groups in length of scan path and number of objects reported, but no significant differences in scanning efficiency. Coordinated binocular eye movements…