No. FSL does not have any corrections for violations of sphericity. In a NxN repeated measures design, there is likely to be violations of sphericity. If you assume that there are no violations then you could use FEAT, although I wouldn't reccommend it unless you can demonstrate that there isn't any violations. Randomise won't work because you have 2 within-subject factors. Best Regards, Donald McLaren ================= D.G. McLaren, Ph.D. Postdoctoral Research Fellow, GRECC, Bedford VA Research Fellow, Department of Neurology, Massachusetts General Hospital and Harvard Medical School Office: (773) 406-2464 ===================== This e-mail contains CONFIDENTIAL INFORMATION which may contain PROTECTED HEALTHCARE INFORMATION and may also be LEGALLY PRIVILEGED and which is intended only for the use of the individual or entity named above. If the reader of the e-mail is not the intended recipient or the employee or agent responsible for delivering it to the intended recipient, you are hereby notified that you are in possession of confidential and privileged information. Any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited and may be unlawful. If you have received this e-mail unintentionally, please immediately notify the sender via telephone at (773) 406-2464 or email. On Mon, Feb 13, 2012 at 3:24 AM, Stéphane Jacobs <[log in to unmask]>wrote: > Hello Tom, > > Thank you for your message. I realize, reading your response, that I > didn't describe my design properly. I forgot to mention (except for the > title) that it is a repeated measures 2-way ANOVA design, where all > subjects performed all 6 conditions. Does that mean that I can run this > analysis using the design matrix I posted, except for the 4th contrast? > > Thanks again, > > Stephan >