Performance peaks at lower levels of arousal for difficult tasks, and at higher levels for easy or well-learned tasks. how might this pegnomenon affect marathon runners? how might the phenomenon afect anxious test-takers facing a difficult test?

The runners tend to excel when aroused by competition.  

High anxiety in test takers may disrupt their performance.

Teaching to anxious students on how to relax before an exam can enable them to perform better.  

Explanation:

Yerks Dodson law shows the performance level and quality of a person. It is the empirical relationship between the performance and the arousal level of a person. This law was developed by Yerkes and Dodson in 1908.

This law shows the performance level of a person when is physiologically and, mentally aroused the performance get up and it is to a certain level.

But if the arousal gets so high, performance gets low. The performance is shown in the shape of a bell-shaped curve.

the first question's answer is a.

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