Skip to main content
. Author manuscript; available in PMC: 2013 Jul 11.
Published in final edited form as: Psychopharmacology (Berl). 2009 Jan 14;204(2):213–225. doi: 10.1007/s00213-008-1451-x

Figure 4.

Figure 4

Group mean amount of locomotion (thick lines) as a function of time in the pre-reinforcer interval for the indicated DRL and drug conditions. Thin lines paralleling the thick lines are the 95% confidence intervals. Note that the ordinates are expressed on a log10 scale. An explanation for why the plotted data begin at 8 s instead of at 0 s is given in the text. Upon plotting, the data were subjected to a lowess smooth in order improve the visibility of the confidence intervals around the mean curves. The amount of smoothing used did not affect the breadth of the confidence intervals.