A person's sense of physical or psychological tiredness is called what?

• A. Ergonomics
• B. Fatigue
• C. Human error
• D. Nominal data scale

Answer: (B)

Fatigue is the sense of physical or psychological tiredness. It means feeling drained, lacking energy, or mentally worn out, which can reduce concentration, motivation, and performance. In design technology contexts, recognizing fatigue helps explain why performance may drop during long tasks and why breaks or adjustments to work conditions are important. Ergonomics is about designing the work environment and tools to fit the user, not describing a tiredness state. Human error refers to mistakes that can occur, which may be influenced by fatigue but isn’t the tired feeling itself. Nominal data scale is a way of categorizing data, not a description of tiredness. The term that matches this description is fatigue.