My experiment details seem similar to yours.
For what it is worth, my ANOVA did not look anything like the Rik Henson
one either. It looked like yours. I checked with other people and they got
similar to ours. I tried different ways of setting up the ANOVA and
could't get the Henson_Penny version.
Perhaps Henson used a different version of SPM?
Can't help with the "not uniquely specified" problem. Didn't get that.
Fatima T. Husain, Ph.D.
NIDCD/NIH
Bldg. 10/ Room 8S235-D
Phone: 301-594-7758
On Thu, 25 May 2006, Bernhard Staresina wrote:
> Dear SPM experts,
>
> I'm trying to set up a within subjects ANOVA in SPM2, with beta values for certain conditions as
> dependent measures. I have 16 subjects and three conditions of interest. Correspondingly, I enter 16
> subjects and 3 conditions at the prompts, and then load up the 3 beta images of interest, subject
> after subject. However, when I look at the resulting design matrix (attached as 'anova_matrix'), it
> doesn't look like the example provided by Rik Henson and Will Penny (attached as
> 'r_henson_example'), and importantly it says that the betas are not uniquely specified. My question is
> whether I did something wrong with the setup and/or whether I should be worried about the 'not
> uniquely specified' statement.
>
> Thanks a lot for your help!
>
> Cheers,
> Bernhard
>
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