Question

A student conducts a research project to test the effect of an independent variable with two conditions. The value for Cohen's d for her data is 0.25. Based on this, she concludes that the independent variable had _________ effect on the dependent variable.

Answer 1

The size of the effect of the independent variables on dependent variable is medium.

Explanation:

The theory developed by Cohen suggests that a value of coefficient d less than or equal to 0.2 is evidence of a small effect size. A coefficient value d greater than 0.2 and less than or equal to 0.5 is evidence of a medium effect size and a coefficient value d greater than 0.5 is evidence of a large effect size.

Therefore, a value of d = 0.25 allows us to state that the size of the effect of the independent variables on dependent variable is medium.