The following formula is involved in the calculation of effect size values for multiple regression studies:
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Cohen's f2 effect size for an F-test:
where R2 is the squared multiple correlation.
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The following references can be used to cite this effect size calculator for multiple regression:
| Soper, D.S. (2012) "Effect Size Calculator for Multiple Regression (Online Software)", http://www.danielsoper.com/statcalc3. |
| Cohen, J. (1988) "Statistical Power Analysis for the Behavioral Sciences (2nd Edition)", Lawrence Earlbaum Associates, Hillsdale, NJ. |