Signal Detection Theory in the Analysis of Human Vigilance

Abstract
This note analyzes several recent experimental and theoretical reports on vigilance that use the theory of signal detectability (TSD). The psychological interpretation of the TSD measure of criterion, β, as an index of conservativeness during a vigil does not appear to be valid. As computed, β is probably an artifact due to pooling observations made under different conditions of attentiveness during a long vigil. The basic problems of vigilance research remain: to determine the condiitons that affect attentiveness in signal detection tasks.

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