Carroll, K.M., Ball, S.A., Martino, S. Nich, C., Gordon, M.A., Portnoy, G.A. & Rounsaville, B.J.  (2008). Computer-assisted delivery of cognitive behavioral therapy for addiction:  A randomized trial of CBT4CBT.  The American Journal of Psychiatry. 165(7):  881-888.  

This study offers compelling evidence for the efficacy of computer-assisted training for promoting substance abstinence, as measured by urine toxicology screens.  Results indicate that CBT4CBT is an effective adjunct to standard outpatient treatment for substance dependence.