hi all
i am 40 years old and just realized this year that i've been using caffeine for many years to self-medicate for ADD. When i tried to go off caffeine i got horrible headaches and also could not attend to any task, make a grocery list, etc. it was horrible!! so IMO caffeine absolutely can have a positive effect on attentional issues though not without other side-effects that aren't so pleasant, like withdrawal symptoms!
irene