United States Department of Transportation
i
Effects of conflicting auditory stimuli on color-word interference and arousal.
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1971-03-01
[PDF-1.42 MB]
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Edition:OAM report.
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Abstract:Although air traffic controllers are often required to perform in the presence of distracting stimuli, no adequate measures of distraction susceptibility exist. In the study, 50 male subjects were tested to determine whether the interference effect produced by the Stroop color-word test (a potential measure of distraction susceptibility) might be enhanced through the use of simultaneously-presented, conflicting auditory stimuli.
When instructed to respond only to the hue of visually-presented color-words printed in incongruent inks, neither task-related (conflicting color names) nor task-unrelated (random numbers) auditory stimuli resulted in any increase in the Stroop interference effect, and there were no indications of an increase in autonomic indices of arousal. A subsidiary aspect of the study revealed the Stroop interference effect did not occur when the irrelevant stimuli were shifted from the visual to the auditory modality.
It was concluded that the use of simultaneous auditory stimuli, which are similar but irrelevant to the visual stimuli employed, contribute nothing additional to the basic Stroop test in terms of either task interference or level of arousal.
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