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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Steve Greening
April 01, 2010 03:07PM
Hi Gang,

I'm still having troubles with SEM, I had put it aside for a couple weeks, but now it has my full attention.

I tried both the rescaling (using 1deval) and censoring (using 1d_tool.py), and I am still getting an output from 1dSEM that requires a threshold of over 1000. This doesn't make sense to me in terms of the mean changing 1000 standard deviations from the mean.

One thing I didn't mention, which I saw came up in another thread. We used a rapid event related design, which you mention is not ideal for SEM. Using the same data set, we have a context-dependent connectivity analysis. Is it the case that CDCA is a more robust test for rapid-event related design? Maybe we shouldn't be using this data set in a SEM analysis?

Cheers,
Steve

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Subject Author Posted

SEM output

Steve Greening March 09, 2010 04:48PM

Re: SEM output

Gang Chen March 10, 2010 02:03PM

Re: SEM output

Steve Greening March 10, 2010 04:27PM

Re: SEM output

Gang Chen March 10, 2010 04:43PM

Re: SEM output

Steve Greening March 15, 2010 09:38AM

Re: SEM output

Gang Chen March 15, 2010 09:48AM

Re: SEM output

Steve Greening March 16, 2010 10:18AM

Re: SEM output

Gang Chen March 16, 2010 11:08AM

Re: SEM output

Steve Greening April 01, 2010 03:07PM

Re: SEM output

Gang Chen April 02, 2010 01:55PM

Re: SEM output

Steve Greening April 08, 2010 05:46PM