The Effects of Event Rate on a Cognitive Vigilance Task

Objective:The present experiment sought to examine the effects of event rate on a cognitive vigilance task.Background:Vigilance, or the ability to sustain attention, is an integral component of human factors research. Vigilance task difficulty has previously been manipulated through increasing event rate. However, most research in this paradigm has utilized a sensory-based task, whereas little work has focused on these effects in relation to a cognitive-based task.Method:In sum, 84 participants completed a cognitive vigilance task that contained either 24 events per minute (low event rate condition) or 40 events per minute (high event rate condition). Performance was measured through the proportion of hits, false alarms, mean response time, and signal detection analyses (i.e., sensitivity and response bias). Additionally, measures of perceived workload and stress were collected.Results:The results indicated that event rate significantly affected performance, such that participants who completed the low ev...