Which of the following is NOT a fatigue effect?

• A. Slower reaction time.
• B. Reduced attention.
• C. Impaired judgment.
• D. Faster reaction time.

Answer: (D)

Fatigue slows processing and dulls alertness, so it usually makes you respond more slowly, not faster. When you're tired, your attention narrows, your reaction time increases, and your judgment about speed and distance can be impaired. Faster reaction time isn’t a fatigue effect; in fact, fatigue tends to slow you down. So the description of a faster reaction time is the one that isn’t caused by fatigue.