Can you attach a jpg of your design?
Also, if you run a 1 sample t-test using all of these images, does the
model run? This would help determine if the problem is with the data
or the files.
Best Regards, Donald McLaren
=================
D.G. McLaren, Ph.D.
Postdoctoral Research Fellow, GRECC, Bedford VA
Research Fellow, Department of Neurology, Massachusetts General Hospital and
Harvard Medical School
Office: (773) 406-2464
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On Thu, Jun 30, 2011 at 1:10 PM, Rick White <[log in to unmask]> wrote:
> I am attempting to set up 3 second-level PPI analyses using Group and Age as
> factors. Upon running the model estimation I receive this error:
>
> Warning: Please check your data: There are no significant voxels.
>> In spm_spm at 812
> In spm_run_fmri_est at 53
> In matlabbatch/private/cfg_run_cm at 29
> In cfg_util>local_runcj at 1363
> In cfg_util at 699
> In cfg_ui>MenuFileRun_Callback at 1156
> In gui_mainfcn at 96
> In cfg_ui at 53
> Failed 'Model estimation'
> Reference to non-existent field 'xKXs'.
> In file "/usr/local/spm/spm8/config/spm_run_fmri_est.m" (v3327), function
> "spm_run_fmri_est" at line 68.
>
> The following modules did not run:
> Failed: Model estimation
>
>
> There is nothing wrong with the individual contrast images that are a part
> of the design as I have looked at each individually and they are the exact
> same images used in a separate design.
>
> As a little background, I have set up second-level PPIs using group and
> hemisphere as the factors having created PPI's from peaks in the left and
> right hemispheres of the seed region. In these designs, I have set up Age as
> a non-orthogonalized covariate of interest and received significant results.
> In order to further characterize this age interaction, I used a group x age
> 2nd level PPI analysis, but using the PPI contrast image from the overall
> peak and split the subjects by their median age (young and old). In all of
> the designs, upon model estimation I am receiving the same error.
>
> Any suggestions/comments?
>
> --
> Rick White
>
>
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