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. Author manuscript; available in PMC: 2014 Apr 1.
Published in final edited form as: Addict Behav. 2013 Jan 17;38(4):2084–2088. doi: 10.1016/j.addbeh.2013.01.007

Figure 2.

Figure 2

Mean incentive phase breath CO samples as a function of the percent of the lowest baseline breath CO sample for each participant. Participants are ranked based on their ability to decrease breath CO values from baseline to the incentive phase of the experiment. Thus, lower ranks are indicative of a lower mean incentive phase breath CO level, relative to their baseline breath CO level. Each point represents one incentive phase breath CO sample. Open circles and open triangles represent loss- and gain-framed participants, respectively.