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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: Behav Processes. 2009 Jul 8;82(3):229–235. doi: 10.1016/j.beproc.2009.06.010

Figure 2.

Figure 2

Mean number of pecks near or in the CS (Filter 40) when the CS moved towards the hopper (filled circles) or when it moved away (open circles) as a function of the distance to the hopper. The bars are standard errors of the mean.