| Further analysis of perception of the standard Müller-Lyer figures in pigeons (Columba livia) and humans (Homo sapiens): effects of length of brackets. | |
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MedLine Citation:
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PMID: 19685970 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Nakamura, Fujita, Ushitani, & Miyata (2006) have shown that pigeons perceive the standard Müller-Lyer illusion. In this report, the authors examined effects of bracket sizes on perception of this illusion in pigeons (Columba livia) and humans (Homo sapiens). In Experiment 1, three pigeons were retrained to classify six lengths of target lines into "long" and "short" by pecking two keys on the monitor, ignoring the two brackets oriented toward the same direction. In the tests that followed, the standard Müller-Lyer figures of different bracket sizes were presented. All birds chose "long" more frequently for the figures having inward-pointing brackets (><) than for those having outward-pointing brackets (<>), regardless of bracket sizes. The overestimation of the target lines of inward-pointing figures continued to increase in pigeons, whereas it decreased as the bracket size became longer in humans (Experiment 2). The results suggest that these two species perceive the standard Müller-Lyer illusion with long brackets in different ways. Perhaps pigeons might not perceive illusions induced by contrast with the surrounding stimuli. |
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Authors:
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Noriyuki Nakamura; Sota Watanabe; Kazuo Fujita |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of comparative psychology (Washington, D.C. : 1983) Volume: 123 ISSN: 0735-7036 ISO Abbreviation: J Comp Psychol Publication Date: 2009 Aug |
Date Detail:
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Created Date: 2009-08-18 Completed Date: 2009-09-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8309850 Medline TA: J Comp Psychol Country: United States |
Other Details:
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Languages: eng Pagination: 287-94 Citation Subset: IM |
Copyright Information:
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Copyright 2009 APA, all rights reserved. |
Affiliation:
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Graduate School of Letters, Kyoto University, Kyoto, Japan. nnakamura.illusion@gmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Aged Aged, 80 and over Animals Attention Columbidae* Discrimination Learning Female Humans Male Middle Aged Optical Illusions* Orientation* Pattern Recognition, Visual* Psychophysics Reversal Learning Size Perception* Species Specificity Young Adult |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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