...@nmr.mgh.harvard.edu]
*Sent:* Mon 1/12/2009 4:03 PM
*To:* Xie, Hong
*Cc:* freesurfer@nmr.mgh.harvard.edu
*Subject:* Re: [Freesurfer] Qdec correlation analyses
why not a continuous model? what model do you want to use?
Xie, Hong wrote:
> Thanks a lot. This scrip seemly describes F-test or T-t
have statistic
method choice?
Sorry, too many questions. Thanks.
Hong Xie
From: Douglas N Greve [mailto:gr...@nmr.mgh.harvard.edu]
Sent: Mon 1/12/2009 4:03 PM
To: Xie, Hong
Cc: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] Qdec correlation analyses
g Xie
*From:* Douglas N Greve [mailto:gr...@nmr.mgh.harvard.edu]
*Sent:* Mon 1/12/2009 3:11 PM
*To:* Xie, Hong
*Cc:* freesurfer@nmr.mgh.harvard.edu
*Subject:* Re: [Freesurfer] Qdec correlation analyses
Not with QDEC, but you can write your own FSGD, See
https://surfer.nmr.mgh.harvar
g
Cc: freesurfer@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] Qdec correlation analyses
Not with QDEC, but you can write your own FSGD, See
https://surfer.nmr.mgh.harvard.edu/fswiki/FsgdExamples
Xie, Hong wrote:
> Hello,
> Thank you for answering me. I searched mailing list and read th
*From:* Douglas N Greve [mailto:gr...@nmr.mgh.harvard.edu]
*Sent:* Thu 1/8/2009 4:40 PM
*To:* Xie, Hong
*Cc:* freesurfer@nmr.mgh.harvard.edu
*Subject:* Re: [Freesurfer] Qdec correlation analyses
It has to be interpreted as a continuous variable
@nmr.mgh.harvard.edu
Subject: Re: [Freesurfer] Qdec correlation analyses
It has to be interpreted as a continuous variable. The test is done
using a t-test inside the glm. This reduces to a Pearson if there is
only one variable and no intercept (which it is not).
doug
Xie, Hong wrote:
>
>
It has to be interpreted as a continuous variable. The test is done
using a t-test inside the glm. This reduces to a Pearson if there is
only one variable and no intercept (which it is not).
doug
Xie, Hong wrote:
Hello, freesurfer group,
I have run qdec for comparing thickness betwee
Hello, freesurfer group,
I have run qdec for comparing thickness between two groups. When qdec
does a correlation analyses for thickness versus a second variable: 1)
Does the second variable have to be a continuous interval variable or 2)
can the second variable be an ordinal variable with mor
