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	Author	Beran, M.J.; Smith, J.D.; Perdue, B.M.
	Title	Language-Trained Chimpanzees (Pan troglodytes) Name What They Have Seen but Look First at What They Have Not Seen			Type	Journal Article
	Year	2013	Publication	Psychological Science	Abbreviated Journal	Psychol Sci
	Volume		Issue		Pages
	Keywords
	Abstract	Metacognition can be defined as knowing what one knows, and the question of whether nonhuman animals are metacognitive has driven an intense debate. We tested 3 language-trained chimpanzees in an information-seeking task in which the identity of a food item was the critical piece of information needed to obtain the food. The chimpanzees could either report the identity of the food immediately or first check a container in which the food had been hidden. In two experiments, the chimpanzees were significantly more likely to visit the container first on trials in which they could not know its contents but were more likely to just name the food item without looking into the container on trials in which they had seen its contents. Thus, chimpanzees showed efficient information-seeking behavior that suggested they knew what they had or had not already seen when it was time to name a hidden item.
	Address	1Language Research Center, Georgia State University
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language	English	Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0956-7976	ISBN		Medium
	Area		Expedition		Conference
	Notes	PMID:23508741			Approved	no
	Call Number	Equine Behaviour @ team @			Serial	5659
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