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 […]

Why evidence for natural mentors can be a “very tricky thing”

by Jean Rhodes “Circumstantial evidence is a very tricky thing. It may seem to point very straight to one thing, but if you shift your own point of view a little, you may find it pointing in an equally uncompromising manner to something entirely different.”A.C. Doyle The most recent issue of the American Journal of Community […]