Analyse the SPSS File by Running a Mixed Design ANOVA

Multiple Choice

Analyse the SPSS file by running a mixed design ANOVA with a simple contrast for all three independent variables. You should see the following table. Why is there not a Mauchley's test significance value for the platform variable (i.e. whether the participants could see the force platform or not) ?

A) There are only two levels for this variable.
B) The data were not normally distributed.
C) Levene's test was significant.
D) The Kolmogorov-Smirnov test was not significant.