Binocular probability summation in a choice reaction-time task in pigeons.
We present evidence for binocular summation in pigeons in a choice reaction time paradigm. Considering binocular vision as the result of a race between the equivalent eyes, pigeons can adopt both a 'subject by subject' and a 'trial by trial' race model, and binocular advantage can be attributed merely to a probability summation. Pigeons were tested on a visual discrimination task in which the time for detection was gradually reduced and a quick response was required. The time presentation of a small black spot could vary from 2000 ms to the shortest value (157-226 ms) allowing maintenance of a satisfactory performance criterion.
Kusmic
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Dipartimento di Fisiologia e Biochimica, Università di Pisa, Italy.
Musumeci
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Spinelli
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D000818:Animals; D002755:Choice Behavior; D010856:Columbidae; D011336:Probability; D011930:Reaction Time; D012055:Reinforcement Schedule; D015348:Vision, Binocular; D015349:Vision, Monocular