Which of the following is NOT a recognized subdiscipline of human factors/ergonomics?

• A. System-Centered Ergonomics
• B. Organizational Ergonomics
• C. Physical Ergonomics
• D. Cognitive Ergonomics

Answer: (A)

In human factors/ergonomics, the recognized subdisciplines map to different levels of interaction: the physical aspects of the human body, the mental processes we use, and the broader organizational or work-system factors. Physical ergonomics covers biomechanics and the design of tools and workplaces to fit the body. Cognitive ergonomics deals with perception, attention, memory, and decision-making. Organizational ergonomics focuses on the work system, team dynamics, workflows, and overall sociotechnical factors within an organization.

System-centered ergonomics is not typically listed as a distinct subdiscipline alongside these three. In many curricula and texts, when the system-level focus is discussed, it’s referred to as macroergonomics or systems ergonomics rather than a separate “system-centered” branch. So the item that is not a recognized subdiscipline is System-Centered Ergonomics, while physical, cognitive, and organizational ergonomics are the standard subdisciplines.