[Eeglablist] about selecting AMVAR model order

[Hui-bin Jia]

Hi  everyone,
 
    In these days, I’m trying to do effective connectivity using the datasets included in the EEGLAB tutorial (e.g. the animal categorization task).
 
   When I was processing these datasets, I used SIFT. Unfortunately, in order to make sure most of the windows pass the ACF test, I had to use a very large model order (e.g. more than 70). But even the model was that high, very few windows passed the portmanteau tests ( e.g. 1 out of 108 windows can pass these test).
 
   The parameter preferences were the same as the parameter preferences in the SIFT manual.
 
   The value of Option “EpochTimeRange” was [-1 1.25], the value of Option “ Normalization method” was “ensemble” and “time”, the value of Option “Select MVAR Algorithm” was “ Vieira-Morf ”, the value of Option “Window length(sec)” was “0.4”, and the value of Option “Step Size(sec)” was “0.01”.
 
   I have tried my best to conquer this problem. But my efforts were useless. So I sincerely hope that I can get some suggestions from you. Thank you!
 
 
 
Yours, Hui-bin Jia
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20120423/d7519500/attachment.html>