The effect of reference signals in a visual vigilance task.

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Author
Criswell, Daniel Lewis
Date
1969Advisor
Poock, Gary K.
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Show full item recordAbstract
The effect of reference signals on performance in a
visual vigilance task was studied under three conditions.
Reference signals were presented on the same display as
the real signals. In condition 1 (control)/ no reference
signals were displayed. Subjects could demand reference
signals whenever they wished in condition 2 (demand
reference) . Reference signals were programmed at arbitrary
times during the experiment in condition 3 (programmed
reference) . Twenty-four subjects were used, eight in each
condition. Neither the display of reference signals upon
demand nor the programmed display of reference signals
significantly affected the overall level of performance.
However, after activation of the reference signal sequence
in condition 2 (demand reference) , there was a significant
short-term improvement in performance. No significant
change in the rate of commissive errors was found. All
three groups showed a significant deterioration of performance
over time during the experiment.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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