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. Author manuscript; available in PMC: 2011 Jun 27.
Published in final edited form as: Drug Alcohol Depend. 2009 Mar 4;102(1-3):88–94. doi: 10.1016/j.drugalcdep.2009.01.005

Figure 1. Task Performance.

Figure 1

Mean (with standard error) reaction time (a) and error rate (b) for the non-drug using control group (dashed) and the cocaine users (solid). The cocaine users had significantly longer reaction times and higher error rates for both the internally-guided and externally-guided tasks. * p<0.01, ** p<0.001, ***p<0.0001