PRIMER ON EFFECT SIZES, SIMPLE RESEARCH DESIGNS, AND CONFIDENCE INTERVALS

A Primer on Effect Sizes, Simple Research Designs, and Confidence Intervals was designed to help individuals learn to calculate effect sizes for their research designs. Effect sizes allow a clinician or researcher to determine the effect of a treatment. For example, an effect size of zero would indicate that the treatment had no effect, but generally, effect sizes allow researchers to see the degree of effect of some treatment or intervention. Often, researchers and clinicians are not aware that