Hi everyone,
I want to analyze with DOSS the relationship between performance on a cognitive task (called '15wt') and cortical thickness, in one group, controlling for the effects for age, gender and education. As a Freesurfer-newbie, it be would really great if someone could check my .sfgd file and contrast.
.sfgd file: GroupDescriptorFile 1 Class .00 plus blue (this is the gender part) Class 1.00 plus red Variables 15_wt Age Edu Input 0050 .00 52 73 4 Input 0051 .00 38 68 5 Input 0054 1.00 35 57 4 Input 0060 1.00 46 58 6 Input 0062 1.00 46 45 5 etc.
contrast: 0 0 .5 0 0
Is this correct? Thanks in advance!
Anita
Yes, though I would probably use [0 0 1 0 0] instead of .5. They will give you identical p-values. Using 1 instead of .5 makes the beta value (ie, regresssion coefficient) more interpretable (if that is something you will look at). doug
On 10/04/2013 07:50 AM, Anita van Loenhoud wrote:
Hi everyone,
I want to analyze with DOSS the relationship between performance on a cognitive task (called '15wt') and cortical thickness, in one group, controlling for the effects for age, gender and education. As a Freesurfer-newbie, it be would really great if someone could check my .sfgd file and contrast.
.sfgd file: GroupDescriptorFile 1 Class .00 plus blue (this is the gender part) Class 1.00 plus red Variables 15_wt Age Edu Input 0050 .00 52 73 4 Input 0051 .00 38 68 5 Input 0054 1.00 35 57 4 Input 0060 1.00 46 58 6 Input 0062 1.00 46 45 5 etc.
contrast: 0 0 .5 0 0
Is this correct? Thanks in advance!
Anita
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Anita van Loenhoud -
Douglas N Greve