Which term describes a downturn in performance over time?

• A. Positive learning curve
• B. Linear learning curve
• C. Learning plateau
• D. Negative learning curve

Answer: (D)

A downturn in performance over time is described by a negative learning curve. This means that as practice or time progresses, performance declines rather than improves. It contrasts with a positive learning curve, where performance improves with practice; a linear learning curve, which shows a steady, constant rate of improvement; and a learning plateau, where progress stalls at a roughly constant level rather than dropping.

For example, if a runner starts training and their race times get slower week by week, that illustrates a negative learning curve. Such declines can happen due to fatigue, overtraining, insufficient recovery, or technique breaking down under stress.