GraphVar

Dear Johann,

I tried to run my another laptop but got some error messages below.

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Dear Experts,

I have startede experimenting with GraphVar, it is very interesting but I have a few questions.

1.) In my study I perform behavioral testing as well as resting state scans before and after a training session. I am using "group comparison" to run a paired t-test on multiple graph metrics. I define a collumn in the variable spread sheet called "group" with value either "pre" or "post", with all of the pre scans listed followed by all of the post scans listed in the same order. This seems to be working fine.

Dear Johann,

I got a new result according to your advice (150 times permutation tests). (please see the attached figure 1)

I corrected using Groups(FDR) thresholding and got those survived networks.

Could I regard that all the networks  are statistically significant with multiple comparison correction?

Actually, I did not find significant graph-components in Network Inspector panel (attached figure 2) but I think there are still significant networks as seen in the Results panel.

Dear Johann,

I changed initial link threshold and got different graph components.

Here are another questions.

I changed also some parameters as I checked in an attached figure.

According to various parameters, I got totally same graph component but different alpha value in 'Network Inspector'.

When I set the parameters (generate : 1 / Number of repetitions : 1), it showed best alpha value, zero.

However when I set the parameters (generate : 10 / Number of repetitions : more than 10), it showed higher alpha value above 0.5.

Dear experts,

I run group comparison via GraphVar and got some results.

As you see the attached figure, the checked network is significant?

I wonder if only networks which have alpha values below 0.05 showed significant differences or not.

Best regards,

Saske

GraphVar is now fully citable and published in the "Journal of Neuroscience Methods" (2015)

Find the article HERE!

Please cite this toolbox as:
Kruschwitz JD, List D, Waller L, Rubinov M, Walter H, GraphVar: A user-friendly toolbox for comprehensive graph analyses of functional brain connectivity, Journal of Neuroscience Methods (2015)

New GraphVar version: beta 0.5 online!
DOWNLOAD HERE

Dear experts,

I encountered following error message when running resting state data of 80 subjects on windows 7 64 bit with 16GB memory. The process was about 80% completed.

Your help is very much appreciated,

tetsuya

Thank you very much for providing such useful software.