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. Author manuscript; available in PMC: 2007 Nov 19.
Published in final edited form as: Anim Cogn. 2006 Jul 18;10(1):55–62. doi: 10.1007/s10071-006-0031-x

Fig. 2.

Fig. 2

The mean number of communicative behaviors produced by the chimpanzees in the eyes-covered and mouth-covered conditions. Error bars represent standard errors of the mean. (*) indicates a significant comparison, p<0.05