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Social influences of competition on impulsive choices in domestic chicks

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タイトル: Social influences of competition on impulsive choices in domestic chicks
著者: Amita, Hidetoshi 著作を一覧する
Kawamori, Ai 著作を一覧する
Matsushima, Toshiya 著作を一覧する
発行日: 2010年 3月12日
出版者: The Royal Society
誌名: Biology Letters
巻: 6
号: 2
開始ページ: 183
終了ページ: 186
出版社 DOI: 10.1098/rsbl.2009.0748
抄録: Social factors involved in the control of impulsiveness were examined in domestic chicks. In binary choices between a large/long-delay option (LL) and a small/short-delay alternative (SS), chicks that had been competitively trained in groups of three individuals showed fewer choices of LL than did those trained in isolation (experiment 1), suggesting that competition causes impulsive choice. In experiment 2, in order to identify the critical factor involved, we tested the effects of perceived competition (coincident feeding without interruption) and scrounging (gaining food without pecking bead) separately. To examine the effects of risk/noise that individual chicks experienced in competition, the food amount varied randomly in trials according to a binomial distribution around the expected mean. Perceived competition primarily contributed to the influence on the impulsive choice, whereas the contribution of scrounging was weaker. Collection risk did not explain the social influences since the perceived competition was not accompanied by actual interruption of the delayed food reward. The risk owing to variable food per se did not cause impulsive choices. Coincident foraging during competition is thought to play a critical role.
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 松島 俊也


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