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Can Inhibitory Training Produce Reductions in Drinking? Evaluating the Influence of the Control Condition.
Journal of Studies on Alcohol and Drugs 2019 January
OBJECTIVE: Training in an inhibitory control task has produced reductions in alcohol use among heavy drinkers. However, the longevity of effects remains unknown, and much research has used suboptimal control conditions. Here, we assess the effectiveness of "Beer-NoGo" inhibitory training to reduce consumption up to 4 weeks after training compared with a "Beer-Go" control task, an online version of the Brief Alcohol Intervention (BAI), and an Oddball control condition.
METHOD: Eighty-one regular drinkers were randomized into one of four training conditions. In the Beer-NoGo condition, participants responded to a letter superimposed on water-related images and refrained from responding to another letter superimposed on beer-related images. The mapping was reversed for the Beer-Go condition, whereas the Oddball control condition was presented with letters only and inhibition was not required. The last condition was an online BAI. Alcohol use was assessed using a bogus taste test and weekly alcohol consumption.
RESULTS: Taste-test consumption was greater in the Beer-Go condition than in the Beer-NoGo, which did not differ from the Oddball and BAI conditions. All groups reduced alcohol intake during the study; however, in the first week the Beer-Go group reduced their drinking while the Beer-NoGo group increased. No group differences were apparent at the fourth week.
CONCLUSIONS: The Beer-NoGo task did not produce effects beyond simple assessment on reducing alcohol use among regular drinkers. Previously reported training effects may be artifacts of the Beer-Go task as a suboptimal control. More robust forms of inhibitory training are necessary if a useful clinical adjunct for managing alcohol abuse is to be developed.
METHOD: Eighty-one regular drinkers were randomized into one of four training conditions. In the Beer-NoGo condition, participants responded to a letter superimposed on water-related images and refrained from responding to another letter superimposed on beer-related images. The mapping was reversed for the Beer-Go condition, whereas the Oddball control condition was presented with letters only and inhibition was not required. The last condition was an online BAI. Alcohol use was assessed using a bogus taste test and weekly alcohol consumption.
RESULTS: Taste-test consumption was greater in the Beer-Go condition than in the Beer-NoGo, which did not differ from the Oddball and BAI conditions. All groups reduced alcohol intake during the study; however, in the first week the Beer-Go group reduced their drinking while the Beer-NoGo group increased. No group differences were apparent at the fourth week.
CONCLUSIONS: The Beer-NoGo task did not produce effects beyond simple assessment on reducing alcohol use among regular drinkers. Previously reported training effects may be artifacts of the Beer-Go task as a suboptimal control. More robust forms of inhibitory training are necessary if a useful clinical adjunct for managing alcohol abuse is to be developed.
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