 This is the next part of the project under a National Institute of Drug Abuse-funded R01 treatment development study with the purpose of developing a computer-based augmentation of standard drug counseling for cocaine dependence. This project has received additional funding from NIDA. Specifically, the aims of the next part of the proposal are to develop and manualize a cue-exposure based cocaine treatment using virtual reality VR based cue exposureextinction software and cellular phone-based computerized extinction reminder CER technology for use in high-risk situations outside treatment sessions. We will enroll a total of 270 cocaine dependent subjects in order to meet the target goal of 180 subjects in treatment. This randomized clinical trial will be conducted in order to determine the acceptability and feasibility of this treatment to subjects and therapists, and to obtain treatment outcome effect size estimates. Specifically, during the next stage of the study, 180 cocaine dependent individuals will be randomly assigned to receive a NIDA approved IndividualGroup Drug Counseling IGDC cocaine treatment or IGDC plus VRCER. Matching between treatment groups will be based on age, sex, severity of crack use using the Addiction Severity Index, and presence or absence of antisocial personality disorder. Treatment assignment will be conducted using a computerized urn matching program by the off-site study statistician. Current psychiatric diagnoses will be assessed, as will changes in crack use. Comprehensive assessments will be conducted during treatment at baseline, and at a six-month and twelve-month follow-up. To measure outcomes, substance use will be assessed via self-report and urinary analysis three times weekly during 24 weeks of active treatment and weekly during six month and twelve month of follow-up assessment. 