= Computing effect sizes =

'''Cohen's d''' which is used for t-tests may be computed using free
[http://www.swin.edu.au/victims/resources/software/effectsize/effect_size_generator.html PC downloadable software.]

SPSS computes '''partial eta-squared''', $\mbox{Partial } \eta^text{2}$, on request using ANOVAs. If using General Linear Model>univariate or General Linear Model>Repeated Measures click options and select ''Estimates of Effect Size''. 

An extra column in the outputted anova tables is produced showing partial eta-squareds of terms in the anova table.