The purpose of this study is to examine potential stress and immune systems adaptations underlying craving and relapse vulnerability in alcohol dependent (AD) individuals and social drinkers (SDs) with and without high levels of depressive symptomatology (+dep / - dep). Using the investigators experimentally validated guided imagery procedure, the investigators propose to examine the response of brain stress and immune systems to personalized guided stressful imagery using subjective, physiological and neurobiological assessments in 60 healthy controls and 60 alcoholic dependent individuals with and without depressive symptomatology.