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  • Title: Drug Stroop: Mechanisms of response to computerized cognitive behavioral therapy for cocaine dependence in a randomized clinical trial.
    Author: DeVito EE, Kiluk BD, Nich C, Mouratidis M, Carroll KM.
    Journal: Drug Alcohol Depend; 2018 Feb 01; 183():162-168. PubMed ID: 29258028.
    Abstract:
    BACKGROUND: Poor performance on Drug Stroop tasks, which could indicate attentional bias to drug-related cues, craving, poor cognitive control (including poor response inhibition), has been associated with substance use severity, treatment retention and substance use treatment outcomes. Cognitive Behavioral Therapy (CBT) focuses on training in appraisal and coping strategies, including strategies to minimize the negative impact of triggers and coping with drug-cue-induced craving. One mechanism of action of CBT may be the strengthening of cognitive control processes and reduction of attentional bias to drug-related stimuli. METHODS: Methadone-maintained individuals with cocaine-use disorders, participating in a randomized controlled trial of treatment as usual (TAU) versus TAU plus access to computer-based CBT (CBT4CBT), completed a computerized Drug Stroop task at pre- and post-treatment. Analyses determined whether attentional bias toward drug-related stimuli changed differentially by treatment group or cocaine use outcomes across the treatment period and whether engagement in components of CBT4CBT or TAU treatment related to changes in attentional bias toward drug-related stimuli at post- versus pre-treatment. RESULTS: Participants achieving a longer duration of cocaine abstinence during treatment (3+ weeks) showed greater reductions in Drug Stroop Effect than those with shorter maximum continuous abstinence. Reductions in Drug Stroop Effect across treatment were associated with greater engagement with CBT4CBT-specific treatment components, but not TAU-specific treatment components. CONCLUSIONS: Reduction in attentional bias to drug-related cues and craving and/or improved executive cognitive control and response inhibition may contribute to the mechanism of action of CBT4CBT.
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