= A guide to obtaining confidence intervals for effect sizes =

Effect sizes, specifying the magnitude of a statistical comparison. However, this does not tell us how precisely it is measured.

There are [http://www.latrobe.edu.au/psy/esci/ details by Geoff Cumming] and  Steiger, (2004) on combining these concepts by giving confidence intervals for effect sizes.
Michael Smithson [https://www.anu.edu.au/psychology/people/smithson/details/CIstuff/CI.html has syntax] in SPSS and other statistical software to do the computations. There are also some [https://www.anu.edu.au/psychology/people/smithson/details/CIstuff/Noncoht2.pdf workshop notes] to explain what's going on. 




__Reference__

Steiger, JH (2004) Beyond the F Test: Effect Size Confidence Intervals and Tests of Close Fit in the Analysis of Variance and Contrast Analysis. ''Psychological Methods'' '''9(2)''' 164-182.