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According to Cohen, what effect size is represented by a correlation of r= - .50? A....

According to Cohen, what effect size is represented by a correlation of r= - .50?

A. Insignificant

B. small

c. medium

d. large

e. extra large

f. cannot be determined

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Answer #1

Answer: According to Cohen, what effect size is represented by a correlation of r= - .50?

Cohen’s d is known as the difference of two population means and it is divided by the standard deviation from the data.

For r from Pearson correlation, Cohen (1988) gives the following interpretation:

small, 0.10 – < 0.30

medium, 0.30 – < 0.50

large, ≥ 0.50

Therefore, medium effect size is represented by a correlation of r= - .50.

The option c. is correct answer.

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