EDIT: I should explain that a little more: the one test was not definitive. It would’ve been nice if I could have shown a real effect on WM, but effect or no effect, the literature on nicotine & mental performance seems solid enough to override one particular kind of test.
Nicotine gum users survey: http://www.stoptabac.ch/en/Gums/
Takes about 10 minutes; you can not answer any question that is inapplicable (as a great many of them are, since I have never used a tobacco product).
Past research using this survey:
http://www.biomedcentral.com/1471-2458/7/159/
http://dl.dropbox.com/u/85192141/2009-etter.pdf
Do you still use Nicotine gums, following your tests?
Yes.
EDIT: I should explain that a little more: the one test was not definitive. It would’ve been nice if I could have shown a real effect on WM, but effect or no effect, the literature on nicotine & mental performance seems solid enough to override one particular kind of test.