Visual categorization and object representation in monkeys and humans

Sigala, N, Gabbiani, F and Logothetis, N K (2002) Visual categorization and object representation in monkeys and humans. Journal of cognitive neuroscience, 14 (2). pp. 187-98. ISSN 0898-929X

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Abstract

We investigated the influence of a categorization task on the extraction and representation of perceptual features in humans and monkeys. The use of parameterized stimuli (schematic faces and fish) with fixed diagnostic features in combination with a similarity-rating task allowed us to demonstrate perceptual sensitization to the diagnostic dimensions of the categorization task for the monkeys. Moreover, our results reveal important similarities between human and monkey visual subordinate categorization strategies. Neither the humans nor the monkeys compared the new stimuli to class prototypes or based their decisions on conditional probabilities along stimulus dimensions. Instead, they classified each object according to its similarity to familiar members of the alternative categories, or with respect to its position to a linear boundary between the learned categories

Item Type: Article
Keywords: LINEAR DECISION BOUNDARIES; RHESUS-MONKEYS; RAPID CATEGORIZATION; SELECTIVE ATTENTION; CLASSIFICATION; SIMILARITY; IMAGES; DISCRIMINATION; RECOGNITION; FEATURES
Schools and Departments: Brighton and Sussex Medical School > Clinical Medicine
Subjects: R Medicine > RC Internal medicine > RC0321 Neurosciences. Biological psychiatry. Neuropsychiatry
R Medicine > RC Internal medicine > RC0321 Neurosciences. Biological psychiatry. Neuropsychiatry > RC0346 Neurology. Diseases of the nervous system Including speech disorders
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Depositing User: Hazelle Woodhurst
Date Deposited: 14 Nov 2012 14:06
Last Modified: 14 Nov 2012 14:06
URI: http://sro.sussex.ac.uk/id/eprint/42394
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