An Adaptive Vigilance Task with Knowledge of Results

Four groups of subjects performed a 48-min, computer-controlled, visual watch-keeping task. Two groups were run under fixed, non-adaptive conditions, one with immediate knowledge of results (KR) and the other without (NKR). The KR group showed the usual superiority in detection rate over the NKR gro...

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Bibliographic Details
Published in:Human factors 1974-08, Vol.16 (4), p.333-338
Main Author: Wiener, Earl L.
Format: Article
Language:English
Subjects:
Attention
Computers
Discrimination (Psychology)
False alarms
Humans
Knowledge of Results (Psychology)
Photic Stimulation
Task analysis
Vigilance
Visual Perception
Visual tasks
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Summary:Four groups of subjects performed a 48-min, computer-controlled, visual watch-keeping task. Two groups were run under fixed, non-adaptive conditions, one with immediate knowledge of results (KR) and the other without (NKR). The KR group showed the usual superiority in detection rate over the NKR group, and made fewer commissive errors (false alarms). Two other groups, also KR and NKR, ran under adaptive conditions, wherein the size of the signals they watched for was adjusted during the vigil according to past performance, so as to maintain a preset detection rate. The resulting curves for the adaptive variable closely resembled the traditional performance measure, detection rate. Various adaptive strategies are discussed.
ISSN:0018-7208
1547-8181
DOI:10.1177/001872087401600401