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| Research article summary (published 30 Mar 2009): |
Rotational object discrimination by pigeons.
Full Abstract
Four experiments examined the discrimination of directional object motion by pigeons. Four pigeons were tested in a go/no-go procedure with video stimuli of pigeons rotating right or left around their central y-axis. This directional discrimination was learned in 7 to 12 sessions and was not affected by changes in object starting orientation, but did require the coherent ordering of the videos' successive frames. Subsequent experiments found no or little transfer of this motion discrimination to novel objects. Experiments varying the speed of rotation and degrees of apparent motion per frame revealed that both factors strongly affected the discrimination. Finally, tests with partial occlusion of different portions of a rotating object suggested that the majority of the object was likely involved in determining rotational direction. These experiments indicate that pigeons can exclusively use motion cues to judge relative object motion. They also suggest the pigeons may have used a specific representation of the motion sequences of each object to make the discrimination. Copyright (c) 2009 APA, all rights reserved.
Author information
Author/s: Koban, Angie (A); Cook, Robert (R);
Affiliation: Department of Psychology, Tufts University, Medford, MA 02155, USA. angie.koban(-atsign-)tufts.edu
Journal and publication information
Publication Type: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.
Journal: Journal of experimental psychology. Animal behavior processes (J Exp Psychol Anim Behav Process), published in United States. (Language: eng)
Reference: 2009-Apr; vol 35 (issue 2) : pp 250-65
Dates: Created 2009/04/14; Completed 2009/06/25;
PMID: 19364233, status: MEDLINE (last retrieval date: 6/25/2009, IMS Date: 25 Jun 2009 00:00:00)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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