{"pk":4932,"title":"Psychophysical Context Effects in Chickens Gallus Gallus Domesticus (\nHubbards\n)","subtitle":null,"abstract":"A quantitative frame-of-reference (\nFR\n) model that has been successfully tested in humans was examined in generalization experiments with chickens. In Experiment 1, three groups of two chickens each were trained to discriminate between cubes different in volume and tested with a series of cubes with volumes either below, surrounding, or above the training stimuli. The obtained psychometric functions support the assumption that asymmetrical testing after two stimulus-two response training leads to the changes predicted by the \nFR\n model. In Experiment 2 shifts in the context defining the test series were administered by gradually enlarging the distance between training and test stimuli. While context effects were found in both experiments these were more pronounced in Experiment 2. The results support the general hypothesis that perception in animals undergoes context effects similar to those obtained in human subjects.","language":"en","license":{"name":"Creative Commons Attribution 4.0","short_name":"CC BY 4.0","text":"Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\r\n\r\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.","url":"https://creativecommons.org/licenses/by/4.0"},"keywords":[{"word":"International Journal of Comparative Psychology"},{"word":"Behavior"},{"word":"Behaviour"},{"word":"learning"},{"word":"Behavioral Taxonomy"},{"word":"cognition"},{"word":"Cognitive Processes"},{"word":"Conditioning"},{"word":"Psychophysical"},{"word":"Context"},{"word":"Effect"},{"word":"Chicken"},{"word":"Gallus"}],"section":"Research Article","is_remote":true,"remote_url":"https://escholarship.org/uc/item/03x3d2tv","frozenauthors":[{"first_name":"Barbara","middle_name":"","last_name":"Zoeke","name_suffix":"","institution":"","department":"None"},{"first_name":"Viktor","middle_name":"","last_name":"Sarris","name_suffix":"","institution":"","department":"None"},{"first_name":"Giovanni","middle_name":"","last_name":"Hofer","name_suffix":"","institution":"","department":"None"}],"date_submitted":"2009-05-28T22:29:42+04:00","date_accepted":"2009-05-28T22:29:42+04:00","date_published":"2012-03-29T01:54:42+04:00","render_galley":null,"galleys":[{"label":"","type":"","path":"https://journalpub.escholarship.org/uclapsych_ijcp/article/4932/galley/2819/download/"}]}