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Chen, L. – Science, 1982
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)
Descriptors: Classification, Tachistoscopes, Visual Discrimination, Visual Perception

Dixon, Lois S. – Journal of Applied Behavior Analysis, 1981
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)
Descriptors: Adolescents, Objective Tests, Severe Mental Retardation, Visual Discrimination
Wilkinson, Gene L. – AV Communication Review, 1976
Image size, viewing angle, and contrast affect performance of a visual discrimination task. Further, the three factors interaction in their effect on performance. (Author)
Descriptors: Media Research, Projection Equipment, Visual Discrimination, Visual Stimuli

Jacobs, S. Essie – Occupational Therapy Journal of Research, 2000
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…
Descriptors: Infants, Memory, Occupational Therapy, Tables (Data)
Saumier, Daniel; Chertkow, Howard; Arguin, Martin; Whatmough, Cristine – Brain and Cognition, 2005
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…
Descriptors: Alzheimers Disease, Spatial Ability, Visual Discrimination, Perceptual Impairments
O'Riordan, Michelle – Autism: The International Journal of Research and Practice, 2004
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…
Descriptors: Visual Discrimination, Control Groups, Autism, Adults
Smythe, Ian; Everatt, John; Al-Menaye, Nasser; He, Xianyou; Capellini, Simone; Gyarmathy, Eva; Siegel, Linda S. – Dyslexia, 2008
Groups of Grade 3 children were tested on measures of word-level literacy and undertook tasks that required the ability to associate sounds with letter sequences and that involved visual, auditory and phonological-processing skills. These groups came from different language backgrounds in which the language of instruction was Arabic, Chinese,…
Descriptors: Grade 3, Elementary School Students, Spelling, Reading
Young, Michael E.; Beckmann, Joshua S.; Wasserman, Edward A. – Journal of the Experimental Analysis of Behavior, 2006
We trained four pigeons to discriminate a Michotte launching animation from three other animations using a go/no-go task. The pigeons received food for pecking at one of the animations, but not for pecking at the others. The four animations featured two types of interactions among objects: causal (direct launching) and noncausal (delayed, distal,…
Descriptors: Interaction, Animal Behavior, Animals, Behavioral Science Research
Alsop, Brent; Porritt, Melissa – Journal of the Experimental Analysis of Behavior, 2006
Three pigeons discriminated between two sample stimuli (intensities of red light). The difficulty of the discrimination was varied over four levels. At each level, the relative reinforcer magnitude for the two correct responses was varied across conditions, and the reinforcer rates were equal. Within levels, discriminability between the sample…
Descriptors: Visual Stimuli, Reinforcement, Animals, Animal Behavior
Younger, Barbara A.; Johnson, Kathy E. – Child Development, 2006
Previous research suggests that model competence does not emerge until relatively late in infancy (20-26 months). Development was systematically analyzed within 3 key areas--count noun learning, dual representation, and categorization--hypothesized to support the emergence of model competence in the second year. In an object-handling preferential…
Descriptors: Infants, Models, Concept Formation, Visual Discrimination
Le Grand, Richard; Cooper, Philip A.; Mondloch, Catherine J.; Lewis, Terri L.; Sagiv, Noam; de Gelder, Beatrice; Maurer, Daphne – Brain and Cognition, 2006
Developmental prosopagnosia (DP) is a severe impairment in identifying faces that is present from early in life and that occurs despite no apparent brain damage and intact visual and intellectual function. Here, we investigated what aspects of face processing are impaired/spared in developmental prosopagnosia by examining a relatively large group…
Descriptors: Neurological Impairments, Motion, Perceptual Impairments, Recognition (Psychology)
Parr, Lisa A.; Heintz, Matthew; Akamagwuna, Unoma – Brain and Cognition, 2006
Previous studies have demonstrated the sensitivity of chimpanzees to facial configurations. Three studies further these findings by showing this sensitivity to be specific to second-order relational properties. In humans, this type of configural processing requires prolonged experience and enables subordinate-level discriminations of many…
Descriptors: Cognitive Processes, Recognition (Psychology), Nonverbal Communication, Visual Discrimination
Chen, Zhe; Cave, Kyle R. – Journal of Experimental Psychology: Human Perception and Performance, 2006
What happens after visual attention is allocated to an object? Although many theories of attention assume that all of its features are selected and processed, there has been little direct evidence that an irrelevant feature dimension of an attended nontarget is processed. In 5 experiments presented here, the authors used a singleton paradigm to…
Descriptors: Attention, Visual Perception, Visual Stimuli, Cognitive Processes
Cowan, Nelson; Naveh-Benjamin, Moshe; Kilb, Angela; Saults, J. Scott – Developmental Psychology, 2006
We asked whether the ability to keep in working memory the binding between a visual object and its spatial location changes with development across the life span more than memory for item information. Paired arrays of colored squares were identical or differed in the color of one square, and in the latter case, the changed color was unique on…
Descriptors: Geometric Concepts, Memory, Older Adults, Children
Bertenthal, Bennett I.; Longo, Matthew R.; Kenny, Sarah – Child Development, 2007
The perceived spatiotemporal continuity of objects depends on the way they appear and disappear as they move in the spatial layout. This study investigated whether infants' predictive tracking of a briefly occluded object is sensitive to the manner by which the object disappears and reappears. Five-, 7-, and 9-month-old infants were shown a ball…
Descriptors: Kinetics, Infants, Visual Perception, Object Permanence