Impact of Cognitive Demand on Vigilance Decrement: an Overview

Vigilance decrement has been the main focus of researchers over time. Increasing human-machine interactions and potential risks involved have aggravated researchers to investigate the vigilance phenomenon in various perspectives. Cognitive demand has been identified as an underlying cause of vigilance decrement. Task type and event rate are the important contributors to workload and stress in a vigil task. Successive tasks are more demanding than simultaneous tasks and high event rate more demanding than low event rate conditions. It is significantly important to pay cautious consideration on demand factors while designing systems and work environment involving vigilance functions.