摘要：AbstractExistence of disharmony in sustaining attention and working memory in stimulants abusers and opioids abusers in Iran is observable. The performance of tree group of people included 30 normal person, 27 opioids addict, and 26 stimulant addicts in Paced visual Serial Addition Test (PVSAT) as a measure of sustaining attention and working memory was assessed in this research. Significant difference were observed in sustaining attention, and working memory between tree groups of control (whom never use drugs) and experiments (those are addicted to opioids or stimulants); but there were no significant between two groups of addicted subjects which use opioids or stimulants.
