DETECTABILITY MEASURES IN VIGILANCE: COMMENT ON A PAPER BY WIENER, POOCK, AND STEELE.
DEFENCE RESEARCH MEDICAL LABS TORONTO (ONTARIO)
Pagination or Media Count:
Results of a study of time sharing and vigilance reported by Wiener, et al. 1964 have been reanalysed from the viewpoint of signal detection theory. The reported decline in probability of detecting a signal is shown to be due entirely to a progressive change in the observers response criteria and not to a change in the detectability of the signal. In contrast to the original report that time sharing had a non-significant effect on the probability of detecting a signal, the effect on the detectability of the signal is large. The importance of considering detectability rather than detection measures in vigilance studies is stressed. Author