Effects of Background Event Rate and Critical Signal Amplitude on Vigilance Performance
- 1 August 1974
- journal article
- research article
- Published by SAGE Publications in Perceptual and Motor Skills
- Vol. 38 (3_suppl) , 1175-1181
- https://doi.org/10.2466/pms.1974.38.3c.1175
Abstract
Ss monitored a display consisting of the repetitive presentation of pairs of movements of a bar of light. A neutral background event, for which no overt response was required, was a double deflection of 24 mm. The critical signal for detection was a longer deflection in the second movement within an event. Detection probability was greater for incremental excursions of 33% relative to 8.3% of the base movement. This effect was enhanced twofold when the event rate in which the signals were embedded was 21 as compared to 6 events/min. The results are considered in terms of the elicited observing rate hypothesis proposed by Jerison (1970).Keywords
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