Your friend tells you she found a medium effect size index in her experiment. As an informed statistician, you can guess that her effect size index was probably between
A) 0.10 and 0.30
B) 0.40 and 0.60
C) 0.70 and 0.90
D) 1.00 and 1.20.

Question

Quizplus · Accepted Answer

In the context of effect size indices, a medium effect size is typically considered to be in the range of 0.40 to 0.60. This range is based on conventions suggested by social science statistics, where 0.20 is considered a small effect, 0.50 a medium effect, and 0.80 a large effect.

Your Friend Tells You She Found a Medium Effect Size