Cocaine Dependence Clinical Trial
Official title:
A Behavioral Model for Maintenance of Drug Abstinence
The purpose of this study is to develop a model for long-term maintenance of behavior change by examining the effects of extending the duration of contingency management (CM) for drug abuse on long-term abstinence outcomes. The primary hypothesis is that the Extended (36 week) CM group will have better long-term outcomes as exhibited by greater rates of abstinence at each follow-up assessment as compared to the Standard (12 week) CM group.
This protocol examines the effects of extending the duration of contingency management (CM) for drug abuse and dependence on long-term abstinence outcomes. Following the tenets of basic behavioral research, we have outlined a model for long-term behavior maintenance that suggests that successful long-term behavior change does not focus on undoing old behaviors, but concentrates on developing new behaviors in a wide variety of new contexts, and provides enduring reinforcement for the new behaviors. The implication of this model is that in order to develop strategies for supporting long-term behavior change we need to determine the optimal duration of continuing treatment-arranged contingencies, better specify incompatible behaviors that emerge for patients who are successful in sustaining periods of continuous drug abstinence, and determine which incompatible behaviors are most likely to have naturally-occurring sustaining contingencies of reinforcement. This research will examine the model by randomly assigning cocaine-dependent or cocaine-abusing methadone maintenance patients to either a Standard (12 week) or Extended (36 week) period of contrived contingencies. We will be conducting a 2 year follow-up in order to investigate whether providing a longer duration of CM will result in a greater proportion of abstinent individuals during this time, how long the abstinence will last and to discover if longer durations of drug abstinence during the first year after treatment entry will predict better longer-term abstinence outcomes. We also compare outcomes on abstinence-related behaviors to see if provision of an extended voucher program leads to an increase in non-drug using natural reinforcers and activities. This study participates in the NIH-sponsored Health Maintenance Consortium designed to promote interchange of concepts, methods and measures related to the maintenance of long-term behavior change. ;
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