Kathi P

Thank you so much for your response, I do have a small follow up question: 9 of the labs record with 64 channels, 4 can only record 32. Is it recommended to just use "similar" electrodes and then standardize them, or is it acceptable to interpolate the missing channels for the less dense setup? Thanks for your help

We are planning to perform a PCA on selected ERPs using your toolkit on a consolidated EEG data from different labs. The data were collected using different recording systems, resulting in different sampling rates (500/512), electrode numbers (64/32) and electrode configurations. I was wondering what would be the best approach go with the PCA? Should I first standardize all the recordings (i.e., selecting only common channels, downsample the data etc.) before proceeding to performing the PCA or is...

Just saw this post now. Are you sure you're GSR is recorded in Volts? If it is a Biosemi thing, it will show you that it is in µV, but actually it is in Ohm or nanosiemens (check your header). http://www.biosemi.nl/forum/viewtopic.php?t=30; http://www.biosemi.nl/forum/viewtopic.php?f=7&t=400

Just saw this post now. Are you sure you're GSR is recorded in Volts? If it is a Biosemi thing, it will show you that it is in µV, but actually it is in Ohm. http://www.biosemi.nl/forum/viewtopic.php?t=30

Just saw this post now. Are you sure you're GSR is recorded in Volts? If it is a Biosemi thing, it will show you that it is in µV, but actually it is in nanosiemens. http://www.biosemi.nl/forum/viewtopic.php?f=7&t=400

Hi to all, I am wondering about my CDA analysis export. As far as I understood I just need to take the average CDA.SCR per condition (of my events) and that is what I would work with in my statistics. But I just realized that sometimes there is a CDA.SCR value, but there was actually no response found (CDA.nSCR is zero) for a certain event. How do I deal with that? Do I still include that value for my exported mean? Or should I exclude this when I calculate it? Another related question is: How do...