Recommendations to expand Cohen’s (1988) rules of thumb for interpreting effect sizes are given to include very small, very large, and huge effect sizes. The reasons for the expansion, and implications for designing Monte Carlo studies, are discussed.
Sawilowsky, Shlomo S.
"New Effect Size Rules of Thumb,"
Journal of Modern Applied Statistical Methods: Vol. 8
, Article 26.
Available at: http://digitalcommons.wayne.edu/jmasm/vol8/iss2/26