A study of the ability of young children to discriminate among such letters as p and q, d and b, using four different methods of discrimination (matching, copying, naming, and writing to dictation). Results show that the accuracy of discrimination is dependent upon the method of assessment employed. (Author/WY)

This paper was presented by the senior author at the Merrill-Palmer Institute Conference on Research and Teaching of Infant Development, February 13-15, 1969. (MH)

A discription of teaching activities and seeing distances makes it easier to prescribe correct lenses. (AP)

Three experiments on tachistoscopic perception of visual stimuli demonstrate that the visual system is sensitive to global topological properties. The results indicate that extraction of global topological properties is a basic factor in perceptual organization. (Author)

Matching-to-sample procedures were used to assess picture representation skills of seven severely retarded, nonverbal adolescents. The results suggested that photo-object matching may be facilitated by using cut-out figures rather than the complete rectangular photo. (Author)

Image size, viewing angle, and contrast affect performance of a visual discrimination task. Further, the three factors interaction in their effect on performance. (Author)

Results of an examination of recognition memory in typically-developing 6- and 9-month-old infants using the Visual Paired-Comparison task show that infants of both ages display a novelty preference when the delay interval is 10 seconds or 5 minutes. After 1 month, younger infants performed at chance levels and older ones looked longer at the…

Individuals with Alzheimer's disease (AD) often have problems in recognizing common objects. This visual agnosia may stem from difficulties in establishing appropriate visual boundaries between visually similar objects. In support of this hypothesis, Saumier, Arguin, Chertkow, and Renfrew (2001) showed that AD subjects have difficulties in…

Recent studies have suggested that children with autism perform better than matched controls on visual search tasks and that this stems from a superior visual discrimination ability. This study assessed whether these findings generalize from children to adults with autism. Experiments 1 and 2 showed that, like children, adults with autism were…

Research has shown that performance on the "Assessment of Basic Learning Abilities" (ABLA) test correlates with language assessments for persons with developmental disabilities. This study investigated whether performance on ABLA Level 6, an auditory-visual discrimination, predicts performance on a receptive language task with persons with severe…

The Ebbinghaus (Titchener) illusion was examined in a remote culture (Himba) with no words for geometric shapes. The illusion was experienced less strongly by Himba compared with English participants, leading to more accurate size contrast judgments in the Himba. The study included two conditions of inducing stimuli. The illusion was weaker when…

The ability to interpret emotions in facial expressions is crucial for social functioning across the lifespan. Facial expression recognition develops rapidly during infancy and improves with age during the preschool years. However, the developmental trajectory from late childhood to adulthood is less clear. We tested older children, adolescents…

Three experiments were carried out to investigate hemispheric asymmetry in color processing among normal participants. In Experiment 1, it was shown that the reaction times (RTs) of the dominant and non-dominant hands assessed using a visual target presented at the central visual field, were not significantly different. In Experiment 2, RTs of…