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. Author manuscript; available in PMC: 2013 Mar 1.
Published in final edited form as: Anim Cogn. 2011 Sep 11;15(2):187–199. doi: 10.1007/s10071-011-0445-y

Fig. 3.

Fig. 3

Accuracy of rats on each trial type as a function of stimulus difficulty. Difficult stimuli included stimulus durations 3.63 and 4.42 s. Easy stimuli included stimulus durations 2.00, 2.44, 6.56, and 8.00 s. The asterisk indicates a significant difference at an alpha-level of P = 0.005. Error bars represent 1 SEM