These results confirm previous findings in binge drinkers and suggest that in a nondependent alcohol-drinking group, differences can be seen in mood and cognitive performance between those that binge drink and those that do not.
Studies of alcohol use often depend on self-reported alcohol intake measured by quantity/frequency questionnaires. Previous research has shown that alcohol consumption may be underestimated by this type of retrospective questionnaire. The primary aim of this study was to compare the accuracy of an Alcohol Use Questionnaire (AUQ) with a 4-week diary account. A further aim was to explore patterns of drinking in young social drinkers, with particular attention to binge drinking, which has been suggested as a factor in increasing the risk of alcohol dependency. University students completed the AUQ in the laboratory. They were then asked to keep a record of their alcohol, nicotine and caffeine consumption over a 4-week period (diary). The questionnaire and the diaries were compared on factors of alcohol intake (units per week) and patterns of drinking behaviour (speed of drinking, number of times being drunk and percentage of times getting drunk when drinking). The two measures (AUQ and diary) were highly correlated on alcohol consumption and the other questions relating to drinking behaviour. However, differences were found between the two measures on alcohol intake, speed of drinking (drinks per hour) and number of times being drunk. Alcohol consumption was underestimated by approximately 12% on the questionnaire, and, when the accuracy of estimation of drinking habits was examined, it was found that high drinkers tended to underestimate their drinking behaviour, whereas lower drinkers tended to overestimate. The results suggest that the AUQ can be used with a reasonable degree of confidence, bearing in mind the tendency for high drinkers to underestimate consumption and drinking behaviour. Relationships between 'binge scores', beverage specificity and alcohol consumption support the idea that the criteria for binge drinkers should be based on patterns of drinking rather than alcohol consumption.
These data support ideas derived from the incentive learning theories of drug addiction. Furthermore, these data suggest that history of alcohol exposure may influence the priming effects of an alcohol pre-load on attentional bias.
Repeated experience of withdrawal from alcohol is thus associated with impaired cognitive function although it appears that for some of these effects, other factors associated with the history of alcoholism might also be involved.
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