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Partial eta-squared is a measure of variance, like r-squared. It tells us what proportion of the variance in the dependent variable is attributable to the factor in question. You can get these measures by choosing the 'Estimates of effect size' option when setting up an ANOVA.
In SAS, eta-squared statistics can be found in semi-partial eta-squared statistics in SAS 9.2. The eta-squared column in SPSS F-table output is actually partial eta-squared () in versions of SPSS prior to V 11.0.was not previously provided by SPSS, however, it is available in V 18.0.It can also be calculated manually: = Between-Groups Sum of Squares / Total Sum of Squares.n SAS, eta-squared statistics can be found in semi-partial eta-squared statistics in SAS 9.2. The eta-squared column in SPSS F-table output is actually partial eta-squared () in versions of SPSS prior to V 11.0.