COUPLING EFFECTS AND PERFORMANCE IN VIGILANCE TASKS.
ARMY MEDICAL RESEARCH LAB FORT KNOX KY
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This investigation examined the performance of 32 Ss on two auditory and visual 90-min vigilance tasks. Conventional and TSD indices were obtained as a function of coupling, sense mode, and time on task. Order effects, correlations between sense modes, and possible effects of observing responses were also examined. Hits and false alarms were noted. There was no significant decline in d over time on task for either sense mode or coupling condition. In general, data on conventional measures of performance was similar for both auditory and visual tasks, regardless of the coupling conditions. Significant cross-modality correlations were obtained. The results are discussed in terms of expectancy theory and an observing response model. Author