PDA programming was designed to obtain craving and mood assessments at least nine times per day, three immediately before smoking, three at 20 min after a smoked cigarette, and three not associated with smoking and randomly placed 20 min or more from any previous reported smoking. The participants were not informed of the study’s specific goal to examine craving and mood ratings before and after smoking. Very few participants’ individual cigarette recordings were assessed both before and after smoking (n~1, per day). That is, practically all assessments associated with a single smoking occurrence were requested either before smoking or after, but not both. Moreover, to decrease participant burden, the majority of recorded cigarettes required no further assessment at all.
