Downs and Abwender (2002) evaluated soccer players and swimmers to determine whether the routine blows to the head experienced by soccer players produced long-term neurological deficits. In the study, neurological tests were administered to mature soccer players and swimmers and the results indicated
a. Use a two factor ANOVA with a =0.05 to evaluate main effects.
b. Calculate the effects size (n2) for the main effects and the interaction