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dear list. i read the discussion in the list about the 2x2 ANOVA with great interest, because i like to setup a similiar design. so i followed the procedure of darren and matt for the flexible factorial design setup. i designed 3 factors (subject (2xn), group (2 groups), condition (2 conditions) /independence yes, yes, no / variance equal, unequal, unequal). specified the design by subject. for each subject of my group 1 the condition matrix is [1 1;1 2], for each subject of my group 2 [2 1;2 2]. There is a main effect of subject (factor number 1) and an interaction of group x condition (factor numbers 2 3). This produces a design very similiar to the ones of darren and matt. i got n columns for my n participants, each with 2 rows. Now the difference and my problem: i got only 3 columns of group x condition instead of my expected 4. these are column 1 (group1 x condition2), column 2 (group1 x condition2), and column 3 (group2 x condition2). the lacking column (group2 x condition1) seems to be mixed into column 2 (see attached file). does anybody know what my mistake is? thanks markus