AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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gang
March 30, 2015 10:05AM
Naveed,

There are a few issues with your analysis:

1) It's better to use 3dMVM in your case, not 3dLME.

2) To avoid unnecessary complications, simply code varaible 'sex' as a factor, not a quantitative variable.

3) Your model

-model "diag+sex+age+IQ"

presumes that there are no interactions among the variables. Are you sure this is what you want?

4) The specifications for all the post hoc tests are incorrect. For example, in the following test:

-gltLabel 1 'IQ-DIAG' -gltCode 1 'diag : 1*IQ ' \

since 'diag' is a factor, the part after the colon (:) should be used to specific the linear combination of the factor levels. The "1*IQ" part does not make sense to 3dMVM/3dLME.

Gang



Edited 1 time(s). Last edit at 03/31/2015 05:36AM by Gang.
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Subject Author Posted

3dLME model problem

Naveed March 29, 2015 10:45PM

Re: 3dLME model problem

gang March 30, 2015 10:05AM

Re: 3dLME model problem

Naveed March 30, 2015 11:04PM

Re: 3dLME model problem

gang March 31, 2015 05:30PM

Re: 3dLME model problem

Naveed March 31, 2015 11:38PM