<qa>  What is the purpose of the experience sampling data?Participants will be 112 men and women meeting criteria for alcohol dependence, who will be randomly assigned to either a standard packaged manual-driven cognitive-behavioral treatment program PCBT like that used in Project MATCH, or to IATP. Patients in both treatments will be asked to engage in experience sampling for two weeks prior to treatment, and for another two weeks after treatment has ended, in order to compare in-vivo measures of coping skills utilization, pre- and posttreatment, between the two groups. Therapy will be conducted over 12 sessions in both treatments. In IATP, the information gathered from experience sampling will form the basis of a functional analysis of patients drinking and drinking urges during the monitoring period. Cognitive appraisals, moods and coping responses will be evaluated as antecedents and consequences of drinking behavior. Therapists will use the information to address specific cognitions, affects, and behaviors that are adaptive and maladaptive, and will work with the patient to substitute adaptive coping tactics instead. In PCBT the experience sampling data will not be specifically used in therapy, but will still provide in-vivo measures of drinking and coping skills. It is hypothesized that IATP will yield significantly better coping skills acquisition than will PCBT, and that change in coping skills will predict better posttreatment outcomes for IATP. These results would have implications for our delivery of treatment, and for the validity of coping skills training for alcohol addiction. 