Additionally, Veterans diagnosed with alcohol/substance abuse and dependence will be excluded only if they are recently engaged in a maladaptive pattern of use or abuse. More specifically, persons who meet diagnostic criteria for alcohol/substance dependence will be excluded if they have manifested dependence within the previous three months (i.e., have met three or more of the seven criteria for a maladaptive pattern of use in the last three months). Persons with alcohol/substance abuse (who, by definition, do not meet criteria for alcohol dependence) will be excluded if they have shown a maladaptive pattern of alcohol use during the past one month (i.e., have met one or more of the four criteria for a maladaptive pattern of abuse).