The degree to which the experimental manipulation separates the two populations of individual scores is
A)experimental effectiveness.
B)power.
C)the effect size.
D)the significance level.

Question

Quizplus · Accepted Answer

The separation of the two populations of individual scores is measured by the effect size. The effect size refers to the magnitude of the difference between the control and experimental groups. It is a standardized measure of the strength of the experimental manipulation, which can be compared across different studies. Options A and B are incorrect because experimental effectiveness and power refer to different aspects of statistical analysis. Option D is incorrect because the significance level refers to the threshold of probability used to determine whether the observed difference is statistically significant.

The Degree to Which the Experimental Manipulation Separates the Two