The effects of marijuana and alcohol usage on handwriting.
In this study the handwriting of twelve individuals under the influence of marijuana, alcohol, and a combination of the two was compared with control samples. It was found that marijuana smoking in moderate amounts had less effect on the handwriting of the individuals than did alcohol. It  was also found that when the two were combined the gross changes observed were probably due to the effect of the alcohol alone.
D002188:Cannabis; D000431:Ethanol / Q000494:pharmacology*; D006236:Handwriting; D006801:Humans
D000431:Ethanol