Effects of Signal Probability on Individual Differences in Vigilance

摘要

Decrements in the proportion of signals detected over time on task and large individual differences in performance are typical findings in studies of vigilance. This study investigates the effects of signal probability on individual differences in vigilance performance. Participants monitored stimulus events on computer displays over 2-h periods at three signal probability levels (.01, .04 & .12). Results were analyzed between groups, within groups, and within subjects. Detection decrements were found to be inversely related to signal probability levels across groups.