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The categorical representation of visual pattern information by young infants
Authors:P C Quinn
Affiliation:2. Department of Communication Sciences and Disorders, The University of Iowa, Iowa City, Iowa;1. 1st Department of Neurology, Aiginition Hospital, National and Kapodistrian University of Athens Medical School, Greece;2. University of Texas Health Science Center at San Antonio, Department of Neurology, San Antonio, Texas, USA;3. Department of Nutrition and Dietetics, Harokopio University, Athens, Greece;4. Department of Medical School, Democritus University of Thrace, Alexandroupolis, Greece;5. Lab of Cognitive Neuroscience, School of Psychology, Aristotle University of Thessaloniki, Thessaloniki, Greece;6. School of Medicine, University of Thessaly, Larissa, Greece;7. Department of Neurology, Medical School, University of Cyprus, Cyprus;8. Athens Association of Alzheimer''s Disease and Related Disorders, Athens, Greece;9. Section of Sport Medicine and Biology of Exercise, School of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens, Greece;10. Department of Nutrition and Dietetics, School of Health Sciences, Hellenic Mediterranean University, Crete, Greece;11. Taub Institute for Research in Alzheimer''s Disease and the Aging Brain, the Gertrude H. Sergievsky Center, Department of Neurology, Columbia University, New York, New York, USA
Abstract:The present research studied 3- and 4-month-old infants' ability to acquire two categories simultaneously. A familiarization-novelty preference procedure and geometrical form categories were used in all experiments. In Experiments I and 3, infants were familiarized with either a single form category, two form categories, or a single form category plus a set of forms that did not define a category. The results showed that, despite increased attentional and memorial demands, presentation of an additional form category did not harm the efficiency of categorization (Experiment 1) and changed the representation of the form category information from exemplars to a prototype (Experiment 3). Contrasting form information that was not categorical in structure decreased the infant's ability to recognize new members of the single familiar category (Experiment 1) and hindered the infant's ability to form a categorical representation (Experiment 3). The categorization behavior observed in Experiment 1, as indexed by the generalization of habituation to novel forms from a familiar category, was shown not to be a consequence of the inability to discriminate between individual members from the familiar form category (Experiment 2). The implications of these results for cognitive development are discussed.
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