 |
 |
(1) the subject factor should be set to equal variance. (2) see the attached file for an introduction to contrast weights. Although, in the examples there isn't the second repeated factor. It should be a good start though and hopefully provide you enough information to construct more complicated contrasts for the larger design. On Wed, Jul 9, 2008 at 1:51 AM, Amit Etkin <[log in to unmask]> wrote: > ANOVAers: > > I've taken the advice to specify a subject factor in the flexible factorial > model, and currently have a design matrix (see attached) with the following > factors: > > 1. subject (45 levels, indep, uneq var) > 2. group (2 levels, indep, uneq var)...an across subject effect > 3. region (2 levels, no indep, eq var)...a within subject effect > 4. side (2 levels, no indep, eq var)...a within subject effect > > When it has you specify main effects and interactions, the following are > specified (in this order): > > 1. main effect of factor 2 > 2. main effect of factor 3 > 3. main effect of factor 4 > 4. interaction of factors 2 and 3 > 5. main effect of factor 1 > 6. interaction of factors 2 and 4 > 7. interaction of factors 3 and 4 > > The result of all that is a design matrix such as the one attached. > > Can someone take a look at the design matrix to see if it seems correct? > > Also, how do I go about specifying contrasts using the flexible factorial > and with the design matrix attached in order to get F tests of main effects > and interactions, and corresponding t-tests? I've so far only dealt with > the > full factorial approach, where it's all laid out for you. > > many thanks!!! > > Amit > -- Best Regards, Donald McLaren ===================== D.G. McLaren University of Wisconsin - Madison Neuroscience Training Program Tel: (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.