Hello all,
I have not used one way anova before but I believe it is used for more than two groups.
My experiment involves five conditions, A, B, C, D, and E.
My aim is to see the relation between the five conditions and whether this increases the activations.
I have specified each condition in a separate regerssor for each subject. Then I contrast each condition versus rest, for example 1 0 0 0 0 0. So I created five contrasts in the first level.
Then, I took the contrast images of the first level from each condition and each subject and entered them into a one way anova. So I had five cells representing the five conditions. Here, I added an F tests like this:
1
0 1
0 0 1
0 0 0 1
0 0 0 0 1
This allows me to investigate the contrast estimate for all of the five conditions.
Questions:
1)is this correct?
2) if I would like to investigate a linear or non linear relations between the five conditions, for example acceleration rate - very slow, slow, mid, fast, very fast, and the contrast estimate at a voxel, can test the correlation outside spm and report it OR is there anyway of adding these five condition into spm, for example representing them by 1 2 3 4 5, and then see the relation.
I hope I have explained it clearly:-).
Thank you in advance,
,
Aser
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