One of psychology's better known findings is that performance is good at moderate levels of arousal and poor at both high and low levels of arousal (Yerkes-Dodson). Which of the following is true?
A) the strength of this relationship can best be assessed with Pearson's r
B) this is an example of a positive linear correlation
C) this is an example of a negative linear correlation
D) a Pearson's r for this relationship would be close to zero

Question

Quizplus · Accepted Answer

The Yerkes-Dodson law describes a curvilinear relationship, not a linear one, so Pearson's r, which measures linear correlation, would be close to zero.

One of Psychology's Better Known Findings Is That Performance Is