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Publication - Dr Angela Attwood

    Drinking status but not acute alcohol consumption influences delay discounting

    Citation

    Adams, S, Attwood, AS & Munafò, MR, 2017, ‘Drinking status but not acute alcohol consumption influences delay discounting’. Human Psychopharmacology, vol 32.

    Abstract

    OBJECTIVE: The aim of this study was to investigate the following: (a) the effects of acute alcohol on delay discounting; (b) the effects of drinking status on delayed discounting; and (c) whether these effects differ according to reward type (alcohol vs. money).

    METHODS: Heavy and light social alcohol users (n = 96) were randomized to receive either an acute dose of alcohol at 0.4 or 0.6 g/kg or placebo in a between-subjects, double-blind design. Delay discounting of alcohol and monetary rewards was measured using a hyperbolic model, with higher scores indicative of greater delay discounting.

    RESULTS: ANOVA of discount scores indicated a main effect of reward type, where all participants had higher discount scores for alcohol versus money rewards. A main effect of drinking status was also observed, where heavier drinkers had higher discount scores compared with lighter drinkers. We did not observe a main effect of acute alcohol use on delay discounting or the hypothesized interactions between acute alcohol use and drinking status with reward type.

    CONCLUSIONS: Our data suggest that heavier drinkers discount the value of delayed rewards more steeply than lighter drinkers. Delay discounting may therefore be a promising marker of heavy alcohol consumption in social drinkers.

    Full details in the University publications repository