Journal article
Discrimination of coherent and incoherent motion by pigeons: An investigation using a same-different motion discrimination task
Behavioural processes, Vol.93, pp.116-124
02/2013
DOI: 10.1016/j.beproc.2012.10.004
PMID: 23085119
Abstract
► We taught 7 birds to discriminate coherent and incoherent motion patterns of 8 icons. ► Four birds learned the task with icon arrays beginning in random spatial arrangements. ► Discrimination accuracy rose as the number of icons (2, 4, 6, 8, or 12) increased. ► The birds discriminated the displays by relying on the relative motion of the icons. ► The movement of individual icons impaired performance to coherent motion displays.
We trained seven pigeons to discriminate arrays of 8 identical icons that made small random movements in the same direction (coherent movement) from arrays of 8 identical icons that made small random movements in different directions (incoherent movement), with each icon moving within its own cell in an invisible 4×4 grid. During initial training, one specific configuration of icons (a fixed array) was used. The pigeons learned this discrimination and were later trained with successively introduced novel fixed arrays, and finally with novel arrays of random spatial arrangements (random arrays). Four pigeons successfully learned the final version of the task and were tested with random arrays containing different numbers of icons (from 2 to 12). Discrimination accuracy rose as the number of icons increased. These and other findings suggested that the pigeons had discriminated the visual displays by relying on the relative motion of the icons. Nevertheless, motion signals from individual icons (i.e., absolute motion) did interfere with discriminative performance to arrays of coherently moving icons. These results were considered in light of findings from another experiment in which pigeons had to search for a static icon among identical icons that moved coherently or incoherently as in the present study.
Details
- Title: Subtitle
- Discrimination of coherent and incoherent motion by pigeons: An investigation using a same-different motion discrimination task
- Creators
- Masako Jitsumori - Department of Cognitive and Information Sciences, Faculty of Letters, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, JapanNoriyuki Nakamura - Department of Cognitive and Information Sciences, Faculty of Letters, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, JapanEdward A Wasserman - Department of Psychology, Delta Center, The University of Iowa, Iowa City, IA 52242, United States
- Resource Type
- Journal article
- Publication Details
- Behavioural processes, Vol.93, pp.116-124
- Publisher
- Elsevier B.V
- DOI
- 10.1016/j.beproc.2012.10.004
- PMID
- 23085119
- ISSN
- 0376-6357
- eISSN
- 1872-8308
- Grant note
- 13610076 / Ministry of Education, Science, and Culture
- Language
- English
- Date published
- 02/2013
- Academic Unit
- Psychological and Brain Sciences; Iowa Neuroscience Institute
- Record Identifier
- 9984070460002771
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