The following is quoted from a 2003 doc, Alcohol, nicotine, caffeine, and mental disorders, which has other information that I don't necessarily agree with when it uses some fuzzy math, but much of the information is interesting.
"People choose to smoke because they appreciate the psychoactive, stimulant effect of nicotine. Smokers report that smoking helps them concentrate, reason, and perform - observations consistent with studies demonstrating that nicotine improves attention, learning, reaction time, and problem solving. For example, studies suggest that nicotine Increases the speed of sensory Information processing In smokers."
For the geeks, Effects of tobacco smoking and abstinenc... [Clin Pharmacol Ther. 1998] - PubMed - NCBI
"People choose to smoke because they appreciate the psychoactive, stimulant effect of nicotine. Smokers report that smoking helps them concentrate, reason, and perform - observations consistent with studies demonstrating that nicotine improves attention, learning, reaction time, and problem solving. For example, studies suggest that nicotine Increases the speed of sensory Information processing In smokers."
For the geeks, Effects of tobacco smoking and abstinenc... [Clin Pharmacol Ther. 1998] - PubMed - NCBI
