Two follow up questions from post regarding bootstrapping contrasts for a RM ANOVA:
1. Because my data are repeated measures, isn't it true that I want to shuffle my column heading individually for each subject (row) by resampling WITHOUT replacement? 2. For my DV (latency) I have 3 columns of data (3 levels) for each subject: treatment 1 treatment 2 treatment 3 Subject 1 43 sec 110 sec 65 sec Subject 2 400 sec 650 sec 430 sec Subject 3 35 sec 40 sec 50 sec . . . . . . . . . . . . . . . The data are nowhere near normally distributed, so I bootstrapped the RM ANOVA, which was signficant. Now I want to do an orthogonal contrast asking if (treatment 1) is different than (treatment 2 + treatment 3) because this is the a priori sensible question to ask given the overall effect. If this means I would average columns 2 and 3 I think this is statistically wrong due to a difference in sampling? Thanks, Alex Thanks -- Alexander T Baugh Section of Integrative Biology Univ. of Texas at Austin C0930 Austin, TX 78712 http://darktropic.blogspot.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.