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A comparison of the acute effects of a low dose of alcohol on mood and performance of healthy volunteers and subjects with upper respiratory tract illnesses

Health Psychology Research Unit, Department of Psychology, University of Bristol, 8 Woodland Road, Bristol BS8 1 TN, UK

H. Whitney

Health Psychology Research Unit, Department of Psychology, University of Bristol, 8 Woodland Road, Bristol BS8 1 TN, UK

M. Thomas

Health Psychology Research Unit, Department of Psychology, University of Bristol, 8 Woodland Road, Bristol BS8 1 TN, UK

P. Brockman

Health Psychology Research Unit, Department of Psychology, University of Bristol, 8 Woodland Road, Bristol BS8 1 TN, UK

K. Perry

Health Psychology Research Unit, Department of Psychology, University of Bristol, 8 Woodland Road, Bristol BS8 1 TN, UK

An experiment was carried out to determine whether a low dose of alcohol produced different behavioural effects in healthy volunteers to those suffering from an upper respiratory tract illness. Ninety-nine subjects were tested, with 48 subjects being assigned to the alcohol condition and 51 to the juice only condition. A dose of 1.5 ml of vodka per kg body weight was used and the alcohol manipulation was double-blind. Approximately half of the subjects in each condition were healthy and the others had upper respiratory tract illnesses, probably colds. Subjects with colds reported an increase in negative affect and were slower at performing psychomotor tasks. Few main effects of alcohol were obtained. Of major interest were the interactions between health status and alcohol conditions. The alcohol improved the mood of healthy subjects but produced greater negative moods in subjects with colds. Similarly, performance of selective and sustained attention tasks showed different effects of alcohol in healthy and ill subjects.

Key Words: alcohol • upper respiratory tract illness • mood • mental performance

Journal of Psychopharmacology, Vol. 9, No. 3, 267-272 (1995)
DOI: 10.1177/026988119500900310


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