Tests Supplementing Within-Subjects ANOVA

Tests supplementing a within-subjects ANOVA are analogous to tests supplementing to a between-subjects ANOVA. The only differences lie in the computational details which are taken care of for you by standard statistical packages. One important computational difference is that when specific comparisons among means are made on within-subjects variables, an error term for each specific comparison is calculated. The same error term is used for all comparisons when the variable is between-subjects.