Accession Number:

AD0621184

Title:

DECISION INTERVAL AND SIGNAL DETECTABILITY IN A VIGILANCE TASK

Descriptive Note:

Research paper

Corporate Author:

DEFENCE RESEARCH MEDICAL LABS TORONTO (ONTARIO)

Personal Author(s):

Report Date:

1964-09-18

Pagination or Media Count:

7.0

Abstract:

The paper discusses the effect of the assumed decision interval on the measurement of d. Previous experiments have revealed a decrement in the detectability d of signals during a particular vigilance task involving the detection of a brief pause in the movement of a clock hand. In order to measure the false alarm probability, Ss were required to make a decision once every five sec. as to whether or not there had been a signal in the previous five sec. In this paper Ss were required to respond as soon as they saw a signal, and it was assumed that the decision interval was the signal duration. The thirty-fold change in assumed decision interval produced very little change in the decrement in d during the run. It is therefore concluded that the length of the assumed decision interval was not a critical factor in determining changes in d during the continuous clock task.

Subject Categories:

  • Psychology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE