The Wisconsin Inventory of Smoking Dependence Motives (WISDM) assesses 13 theoretically-derived dimensions of smoking motivation. These 13 subscales were intended to index comprehensively the severity of tobacco dependence and provide insight into the disorder. Recent studies indicate that four subscales (Automaticity, Craving, Loss of Control, and Tolerance) represent the core features of tobacco dependence and have been dubbed the Primary Dependence Motives (PDM). The remaining nine subscales, the Secondary Dependence Motives (SDM), may be clinically relevant but index less essential features of dependence.