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Subjects with history of cannabis use demonstrated significantly better performance on measures of attention (Digits forward; F=4.1; df= 1,103; p=0.04), processing speed/setshifting (Trails B; F=4.6; df=1,147; p=0.03), and working memory (Digits Backward; F=4.7; df=1, 103; p=0.03).
