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Leslie AM |
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Pretense and representation in infancy: the origins of theory of mind |
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1987 |
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Psychol. Rev. |
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94 |
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412 |
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Equine Behaviour @ team @ |
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3014 |
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Güntürkün, O.; Kesch, S. |
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Title |
Visual lateralization during feeding in pigeons |
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Journal Article |
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Year |
1987 |
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Behavioral Neuroscience |
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Behav. Neurosci. |
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101 |
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3 |
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433-435 |
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use of right vs left eye, amount & accuracy of pecking in food discrimination task, homing pigeons, implications for lateralization of cerebral function |
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In a quasi-natural feeding situation, adult pigeons had to detect and consume 30 food grains out of about 1,000 pebbles of similar shape, size, and color within 30 s under monocular conditions. With the right eye seeing, the animals achieved a significantly higher discrimination accuracy and, consequently, a significantly higher proportion of grains grasped than with the left eye seeing. This result supports previous demonstrations of a left-hemisphere dominance for visually guided behavior in birds. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
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US: American Psychological Association |
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1939-0084(Electronic);0735-7044(Print) |
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Equine Behaviour @ team @ 1987-30501-001 |
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5588 |
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Author |
Terrace, H.S. |
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Title |
Chunking by a pigeon in a serial learning task |
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1987 |
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Nature |
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Nature |
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325 |
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7000 |
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149-151 |
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Animals; Cognition/*physiology; Columbidae/*physiology; Feedback; Learning/*physiology; Male |
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A basic principle of human memory is that lists that can be organized into memorable 'chunks' are easier to remember. Memory span is limited to a roughly constant number of chunks and is to a large extent independent of the amount of informaton contained in each chunk. Depending on the ingenuity of the code used to integrate discrete items into chunks, one can substantially increase the number of items that can be recalled correctly. Newly developed paradigms for studying memory in non-verbal organisms allow comparison of the abilities of human and non-human subjects to memorize lists. Here I present two types of evidence that pigeons 'chunk' 5-element lists whose components (colours and achromatic geometric forms) are clustered into distinct groups. Those lists were learned twice as rapidly as a homogeneous list of colours or heterogeneous lists in which the elements are not clustered. The pigeons were also tested for knowledge of the order of two elements drawn from the 5-element lists. They responded in the correct order only to those subsets that contained a chunk boundary. Thus chunking can be studied profitably in animal subjects; the cognitive processes that allow an organism to form chunks do no presuppose linguistic competence. |
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English |
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0028-0836 |
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PMID:3808071 |
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Equine Behaviour @ team @ |
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2792 |
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