PMID: 8968479Dec 1, 1996Paper

Alcohol and workload as factors affecting the detection of angular acceleration

Aviation, Space, and Environmental Medicine
W N Mughni, L E Ross

Abstract

Previous findings have demonstrated that a low blood alcohol concentration (BAC) decreases subjects' ability to detect changes in angular motion and that this effect persists after the BAC returns to zero. Angular motion thresholds of six alcohol and six placebo subjects holding pilots' certificates were obtained under both low and high task load conditions. The alcohol subjects were tested under double blind conditions in an enclosed simulator apparatus prior to drinking, after drinking (mean BAC = 0.038%), and at a time when the alcohol subjects' BACs had reached zero. Alcohol subjects' mean threshold values for the three threshold test sessions were 0.361, 0.512, and 0.465 degree.s-2 and 0.292, 0.422, and 0.379 degree.s-2 for the high and low task conditions, respectively. Corresponding values for placebo subjects were 0.364, 0.37, and 0.356 degree.s-2 for the high task load condition and 0.311, 0.317, and 0.312 degree.s-2 for the low task load condition. Statistical analyses showed significant task load and sessions effects (p < 0.025). Significant alcohol by test sessions interactions were found for both high and low task load conditions (p < 0.01) with subsequent t-tests showing no alcohol-placebo differences for the pre-...Continue Reading

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