An examination of sustained attention during complex multitasking scenarios

Area of Science:

• Cognitive Psychology
• Human Factors Engineering
• Neuroscience

Background:

• Vigilance decrements are critical in sustained attention tasks.
• Multitasking scenarios present unique challenges to operator performance and safety.
• Understanding temporal changes in performance is essential for complex systems.

Purpose of the Study:

• To examine the time course of vigilance decrements in a demanding multitasking environment.
• To investigate how performance changes over time in a dual-task paradigm.
• To identify factors influencing vigilance during continuous performance tests and tracking tasks.

Main Methods:

• Two experiments involving 123 participants performing a go-no-go target detection continuous performance test (CPT) simultaneously with a driving-based tracking task.
• Utilized a novel dual-task paradigm to simulate complex operator scenarios.
• Applied growth curve analyses to track performance trajectories over time.

Main Results:

• Vigilance decrements were observed in both CPT and tracking tasks.
• The magnitude and pattern of decrements varied across different performance measures and target presentation rates.
• Performance trajectories indicated significant temporal changes in attention and task engagement.

Conclusions:

• Vigilance decrements in multitasking are multifaceted, influenced by executive function, arousal, and motivation.
• Findings support a combined approach integrating cognitive overload, underload, and opportunity-cost models.
• Results can inform the design of operator-system interfaces to enhance safety and effectiveness in mission-critical situations.