What Is an Effect Size

Multiple Choice

What is an effect size?

A) The calculation that a researcher performs to determine the sample size for a study.
B) A statistic that reflects the strength of an intervention's effects.
C) A statistic that reflects the extent to which a confounding variable affected the outcome of an intervention study.
D) The extent to which a study has had an effect on government/social policy.
E) The extent to which a study has had an impact on its research participants.