Example Calculation of Eta-squared from Mixed ANOVA SPSS Output
η2 = SS between / SS total SS T = 2.238 + 0.217 + 28.377 = 30.832 η2 for Health Type = 2.238 / 30.832 = 0.073 η2 for interaction = 0.217 / 30.832 = 0.010 η2 for error = 28.377 / 30.832 = 0.920 The sum of the η2s is 1. In this example, the within-subject ....