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Abstract concepts: data from a Grey parrot.
Pepperberg IM. Pepperberg IM. Behav Processes. 2013 Feb;93:82-90. doi: 10.1016/j.beproc.2012.09.016. Epub 2012 Oct 23. Behav Processes. 2013. PMID: 23089384 Review.
Grey parrot numerical competence: a review.
Pepperberg IM. Pepperberg IM. Anim Cogn. 2006 Oct;9(4):377-91. doi: 10.1007/s10071-006-0034-7. Epub 2006 Aug 15. Anim Cogn. 2006. PMID: 16909236 Review.
55 results