Cognitive Load, Fatigue, and Decision-Making
This lesson builds practical understanding of human factors engineering using a healthcare quality, patient safety, and high-reliability lens.
Learning outcomes
- Describe how fatigue, interruptions, multitasking, and overload affect performance.
- Recognize cognitive burdens in clinical settings.
- Design work to reduce mental strain and support better decisions.
Cognitive load in clinical work
Cognitive load refers to the mental effort required to perform a task. In healthcare, clinicians constantly manage memory demands, interruptions, alarms, prioritization, and uncertainty. When cognitive load is excessive, performance degrades.
Fatigue and attentional limits
Fatigue affects vigilance, reaction time, memory, and decision quality. Interruptions fragment attention and can increase the chance of forgetting the next step in a task. Multitasking often creates rapid task-switching costs rather than true simultaneous productivity.
Designing for mental support
Design can reduce cognitive burden through checklists, visual cues, standardized displays, task separation, reduced unnecessary alerts, clear escalation rules, and better information organization. The aim is not to remove thinking, but to protect it for the tasks that most need it.
Decision-making under pressure
Clinical decision-making often occurs under uncertainty and time pressure. Human factors engineering helps teams understand how context shapes judgment and how better information design can support better decisions.