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    Cocaine addiction is a major public health problem that is particularly difficult to treat. Without medically proven pharmacological treatments, interventions to change the maladaptive behavior of addicted individuals mainly rely on psychosocial approaches. Here we report on impairments in cocaine-addicted patients to act purposefully toward a given goal and on the influence of extended training on their behavior. When patients were rewarded for their behavior, prolonged training improved their response rate toward the goal but simultaneously rendered them insensitive to the consequences of their actions. By contrast, overtraining of avoidance behavior had no effect on patient performance. Our findings illustrate the ineffectiveness of punitive approaches and highlight the potential for interventions that focus on improving goal-directed behavior and implementing more desirable habits to replace habitual drug-taking. Copyright © 2016, American Association for the Advancement of Science.

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    Karen D Ersche, Claire M Gillan, P Simon Jones, Guy B Williams, Laetitia H E Ward, Maartje Luijten, Sanne de Wit, Barbara J Sahakian, Edward T Bullmore, Trevor W Robbins. Carrots and sticks fail to change behavior in cocaine addiction. Science (New York, N.Y.). 2016 Jun 17;352(6292):1468-71

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    PMID: 27313048

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