Your friend tells you she found a small 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 small effect size is typically considered to be in the range of 0.10 to 0.30. This range is based on conventions suggested by Jacob Cohen, a prominent statistician known for his work on statistical power analysis and effect size.

Your Friend Tells You She Found a Small Effect Size