The Inverted U Model is also referred to as which law?

• A. Weber-Fechner Law
• B. Hawthorne Effect
• C. Yerkes-Dodson Law
• D. Law of Diminishing Returns

Answer: (C)

The inverted U model describes how arousal affects performance: as arousal rises from low to a moderate level, performance improves, but if arousal becomes too high, performance declines. This pattern is captured by the Yerkes-Dodson Law. It helps explain why a simple, familiar task might tolerate higher arousal and still be done well, while a difficult task needs a calmer focus to avoid errors. This idea differs from the Weber-Fechner Law, which links stimulus intensity to perceived magnitude; from the Hawthorne Effect, which is about productivity changes when people know they’re being observed; and from the Law of Diminishing Returns, which deals with outputs increasing at a diminishing rate as inputs rise in economics.