A Model for Rivalry between Cognitive Contours
MASSACHUSETTS INST OF TECH CAMBRIDGE ARTIFICIAL INTELLIGENCE LAB
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This report describes research done within the Artificial Intelligence Laboratory and the Center for Biological Information Processing Whitaker College at the Massachusetts Institute of Technology E25-201 Cambridge, Massachusetts 02139, USA and at the Department of Neuroophthalmology of the University Eye Clinic in D7400 Tubingen, West Germany. The interactions between illusory and real contours have been investigated under monocular, binocular and dichoptic conditions. Results show that under all three presentation conditions, periodic alternations, generally called rivalry, occur during the perception of cognitive or illusory triangles, while earlier research had failed to find such rivalry Bradley and Dumais, 1975. With line triangles, rivalry is experienced only under dichoptic conditions. A model is proposed to account for the observed phenomena.