[FieldTrip] ANOVA mixed design, main effect

[Eric Maris]

Hi Olga,


> I still a bit confused about mixed between/within subjects ANOVA design.
> For example I have 1 within subject factor (condition1 and condition2) and
2
> group of subjects. I'd like to examine the effect the effect of group and
> effect of condition, a well as interaction. The only effect I managed to
> examine with filedtrip right now is the interaction one. I subtracted
cond1-
> cond2 and applied ft_timelockstatistic with independentT. I believe this
> approach is related to the concept of the between/within factors
> interaction. But how to examine main effects? I can certainly test them
> separately, but
> 
> I appreciate any help.
> I believe I more or less understand the theory underlying this analysis,
but
> what I need more now is how to implement in technically.


Main effect of Group: Do a between-subjects analysis (using indepsamplesT)
on the dependent variable cond1+cond2

Main effect of the within subjects factor: Do a within-subjects analysis of
cond1 versus cond2 (using depsamplesT), ignoring the Group variable.


Best,

Eric Maris


dr. Eric Maris
Donders Institute for Brain, Cognition and Behavior
Radboud University
P.O. Box 9104
6500 HE Nijmegen
The Netherlands
Visiting address: Spinozagebouw Room B.03.44
T:+31 24 3612651
Mobile: 06 39584581
F:+31 24 3616066
mailto:e.maris at donders.ru.nl
http://www.nphyscog.com/





> 
> Best,
> Olga.
> 
> 
> Olga Sysoeva,
> Research Associate, PhD
> Washington University School of Medicine
> Campus Box 8134
> 660 South Euclid Ave
> Saint Louis, MO 63110-9909
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