Hi, I ran the following in R (on item means): aov(VAR ~(a*b)+Error(item/(a*b)), data = item)
I got this result: Error: item Df Sum Sq Mean Sq F value Pr(>F) a 1 7.7249e+13 7.7249e+13 11.329 0.003934 ** Residuals 16 1.0910e+14 6.8187e+12 --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 Error: item:a Df Sum Sq Mean Sq F value Pr(>F) a 1 1.1218e+14 1.1218e+14 8.6909 0.009449 ** b 1 2.7264e+10 2.7264e+10 0.0021 0.963912 Residuals 16 2.0653e+14 1.2908e+13 --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 Error: item:b Df Sum Sq Mean Sq F value Pr(>F) b 1 6.0538e+13 6.0538e+13 2.7157 0.11886 a:b 1 1.7894e+14 1.7894e+14 8.0272 0.01199 * Residuals 16 3.5666e+14 2.2292e+13 --- Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1 Error: item:a:b Df Sum Sq Mean Sq F value Pr(>F) a:b 1 4.9726e+12 4.9726e+12 0.629 0.4461 Residuals 10 7.9061e+13 7.9061e+12 and I'm not sure what is what in there. Is it reporting a between analysis as well?Why does the interaction between a and b appear several times? When I ran the anova I did get a warning message (In aov(VAR ~ (a * b) + Error(item/(a * b)), : Error() model is singular) I'm confused... Thanks! -- View this message in context: http://r.789695.n4.nabble.com/reading-the-results-of-a-within-subject-test-tp3621044p3621044.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.