regarding interaction calculation

[Tzvetan Popov]

Dear Users,

I have a question regarding calculation of interaction. One imagine 5
subjects observed in 3 experimental conditions. In this case to test
the differences between those three conditions, one would use
'depsamplesF'  with the following design matrix:

design = [1 2 3 4 5 1 2 3 4 5 1 2 3 4 5
                   1 1 1 1 1 2 2 2 2 3 3 3 3 3 3]; , where uvar=1 and
ivar=2

Now if one imagine 2 sessions of the same 5 subjects and want to
calculate 2x3 ANOVA the design matrix may look like this;

design = [1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5
                   1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2
2 2 2 2
                   1 1 1 1 1 2 2 2 2 3 3 3 3 3 3 1 1 1 1 1 2 2 2 2 3 3
3 3 3 3];, where uvar=1, ivar=3 and the second row represents the
group affiliation.

If this calculation is possible, which I am also not certain, my
question is, is the design matrix correct and what should be the cfg.
setting for the 'group affiliation' row?

Many many thanks
tzvetan



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Tzvetan Popov
Clinical Psychology
University of Konstanz
Box 23
78457 Konstanz, GERMANY
Phone: 0049-7531-883086
Fax:      0049-7531-884601
Email:  tzvetan.popov at uni-konstanz.de
*******************************************

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