We introduce two new scales for assessing substance abuse problems with the Minnesota Multiphasic Personality Inventory-2 (MMPI-2): the Addiction Potential Scale (APS), a 39-item empirically derived scale, developed by contrasting the responses of a large residential substance abuse sample with responses from both normative and psychiatric control groups; and the Addiction Acknowledgement Scale (AAS), a 13-item face-valid scale, constructed rationally and with attention to internal consistency. Both new scales are shown to discriminate well between groups and substantially better than other selected substance abuse scales. Covariation between the scales and joint effectiveness are examined. Finally, limitations for their practical utility are expressed, and considerations for future research are identified.