2. We will compare the total number of smoked cigarettes reported by the daily ratings (paper and pencil or palm pilot) to participants' report of their weekly totals. We expect that participants will tend to underestimate the number of cigarettes smoked when asked to report weekly totals. That is, we hypothesize that participants will report smoking fewer cigarettes in their weekly total compared to their daily reports of smoking and that totals based on daily reports will correlate more strongly with cotinine levels.