The Tobacco Craving Questionnaire (TCQ) is a questionnaire designed to assess current tobacco craving. Factor analysis of the 47-item TCQ resulted in four factors: 1) emotionality, smoking in anticipation of relief from withdrawal or negative mood; 2) expectancy, anticipation of positive outcomes from smoking; 3) compulsivity, an inability to control tobacco use; and 4) purposefulness, intention and planning to smoke for positive outcomes. We will use a 12-item version of the TCQ, comprising the three items from each factor that exhibited optimal within-factor reliability (Cronbachs coefficient alpha) and inter-item correlation. The 12-item TCQ is as valid and reliable as the 47-item version. TCQ items are rated on a scale from 1 strongly disagree to 7 strongly agre. Factor scale scores for each participant are obtained by summing the three items.