Chimpanzees prefer African and Indian music over silence.

[Correction Notice: An Erratum for this article was reported in Vol 40(4) of Journal of Experimental Psychology: Animal Learning and Cognition (see record 2014-35305-001). For the article, the below files were used to create the audio used in this study. The original West African akan and North Indian raga pieces were used in their entirety and the Japanese taiko piece was used from the 0:19 second mark through the end.

Within- and between-task consistency in hand use as a means of characterizing hand preferences in captive chimpanzees (Pan troglodytes).

There remain considerable questions regarding the evidence for population-level handedness in nonhuman primates when compared with humans. One challenge in comparing human and nonhuman primate handedness involves the procedures used to characterize individual handedness. Studies of human handedness use consistency in hand use within and between tasks as a basis for hand preference classification.