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Hales, Jena B.; Broadbent, Nicola J.; Velu, Priya D.; Squire, Larry R.; Clark, Robert E. – Learning & Memory, 2015
Structures in the medial temporal lobe, including the hippocampus and perirhinal cortex, are known to be essential for the formation of long-term memory. Recent animal and human studies have investigated whether perirhinal cortex might also be important for visual perception. In our study, using a simultaneous oddity discrimination task, rats with…
Descriptors: Brain Hemisphere Functions, Animals, Eye Movements, Task Analysis
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Giersch, Anne; Glaser, Bronwyn; Pasca, Catherine; Chabloz, Mélanie; Debbané, Martin; Eliez, Stephan – American Journal on Intellectual and Developmental Disabilities, 2014
Individuals with 22q11.2 deletion syndrome (22q11.2DS) are impaired at exploring visual information in space; however, not much is known about visual form discrimination in the syndrome. Thirty-five individuals with 22q11.2DS and 41 controls completed a form discrimination task with global forms made up of local elements. Affected individuals…
Descriptors: Genetic Disorders, Cognitive Ability, Visual Perception, Visual Discrimination
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Norton, Daniel J.; McBain, Ryan K.; Ongur, Dost; Chen, Yue – Brain and Cognition, 2011
Schizophrenia patients exhibit perceptual and cognitive deficits, including in visual motion processing. Given that cognitive systems depend upon perceptual inputs, improving patients' perceptual abilities may be an effective means of cognitive intervention. In healthy people, motion perception can be enhanced through perceptual learning, but it…
Descriptors: Schizophrenia, Visual Perception, Patients, Motion
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Annaz, Dagmara; Remington, Anna; Milne, Elizabeth; Coleman, Mike; Campbell, Ruth; Thomas, Michael S. C.; Swettenham, John – Developmental Science, 2010
Recent findings suggest that children with autism may be impaired in the perception of biological motion from moving point-light displays. Some children with autism also have abnormally high motion coherence thresholds. In the current study we tested a group of children with autism and a group of typically developing children aged 5 to 12 years of…
Descriptors: Autism, Visual Discrimination, Motion, Cognitive Processes
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Grinter, Emma J.; Maybery, Murray T.; Pellicano, Elizabeth; Badcock, Johanna C.; Badcock, David R. – Journal of Child Psychology and Psychiatry, 2010
Background: Several researchers have found evidence for impaired global processing in the dorsal visual stream in individuals with autism spectrum disorders (ASDs). However, support for a similar pattern of visual processing in the ventral visual stream is less consistent. Critical to resolving the inconsistency is the assessment of local and…
Descriptors: Autism, Pervasive Developmental Disorders, Visual Perception, Geometric Concepts
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Kogan, C. S.; Boutet, I.; Cornish, K.; Graham, G. E.; Berry-Kravis, E.; Drouin, A.; Milgram, N. W. – Journal of Intellectual Disability Research, 2009
Background: Standardised neuropsychological and cognitive measures present some limitations in their applicability and generalisability to individuals with intellectual disability (ID). Alternative approaches to defining the cognitive signatures of various forms of ID are needed to advance our understanding of the profiles of strengths and…
Descriptors: Mental Retardation, Down Syndrome, Short Term Memory, Recognition (Psychology)
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Mapstone, Mark; Dickerson, Kathryn; Duffy, Charles J. – Brain, 2008
Similar manifestations of functional decline in ageing and Alzheimer's disease obscure differences in the underlying cognitive mechanisms of impairment. We sought to examine the contributions of top-down attentional and bottom-up perceptual factors to visual self-movement processing in ageing and Alzheimer's disease. We administered a novel…
Descriptors: Alzheimers Disease, Aging (Individuals), Older Adults, Cognitive Ability
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Squire, Larry R.; Levy, Daniel A.; Shrager, Yael – Learning & Memory, 2005
The perirhinal cortex is known to be important for memory, but there has recently been interest in the possibility that it might also be involved in visual perceptual functions. In four experiments, we assessed visual discrimination ability and visual discrimination learning in severely amnesic patients with large medial temporal lobe lesions that…
Descriptors: Visual Discrimination, Patients, Discrimination Learning, Memory
LANE, H.L.; WILSON, F.R. – 1967
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…
Descriptors: Intermediate Grades, Males, Matched Groups, Neurological Impairments