Tag Archive for: significance test

Methods Corner: What is an effect size?

by Adar Ben-Eliyahu, Ph.D. Most studies focus on “statistical significance,” or the probability that certain findings are reflected in the data. To test this, researchers actually propose a “null hypothesis,”  (e.g., mentoring has no effect on self-esteem). If the data show that the null hypothesis has less than a 5% chance of being right, we […]