Search found 10 matches

by kpitt
22 Jul 2020, 16:05
Forum: Data Analysis
Topic: R2 plots following calibration
Replies: 22
Views: 3139

Re: R2 plots following calibration

Hi Jurgen Quick question. We are planning to have participants spell a few words each session, meaning we will get a .dat file for each word they spell. I would like to evaluate the EEG data for the session as whole in EEGlab versus having to evaluate each word and then combining the files. Is there...
by kpitt
25 Jun 2020, 20:49
Forum: Data Analysis
Topic: R2 plots following calibration
Replies: 22
Views: 3139

Re: R2 plots following calibration

Thanks, Jürgen.

I have a couple of computer engineering students in the lab this summer with C++ experience. So, if you would be kind enough to guide them on how to create a small circle for the photodiode, I will have them make a start on that.

All the best,
Kevin
by kpitt
24 Jun 2020, 09:53
Forum: Data Analysis
Topic: R2 plots following calibration
Replies: 22
Views: 3139

Re: R2 plots following calibration

Hi Jürgen, Thanks for the marker explanation, that was helpful. The main reason we are considering getting data from the photodiode is for post processing ERP analysis. I would like to explore the ERPs a little offline. Therefore, I know making efforts to ensure we can best align the data to what in...
by kpitt
19 Jun 2020, 22:56
Forum: Data Analysis
Topic: R2 plots following calibration
Replies: 22
Views: 3139

Re: R2 plots following calibration

Hi Jürgen, So, good news. We went into the lab last week, changed a few settings, and tried a new subject and things worked well! Even better with the facespeller. I was actually able to get pretty high online spelling accuracy using the facespeller with only 2 sequences, which I thought was good. S...
by kpitt
13 Jun 2020, 12:06
Forum: Data Analysis
Topic: R2 plots following calibration
Replies: 22
Views: 3139

Re: R2 plots following calibration

Thanks for the support Jürgen, I really appreciate it and we are looking forward to having BCI2000 running! Regarding the classifier, we are using BCI2000 version 3.05, which from what we can see was the most recent stable version. If there another version of the P300 classifier we should be using? ...
by kpitt
09 Jun 2020, 16:12
Forum: Data Analysis
Topic: R2 plots following calibration
Replies: 22
Views: 3139

Re: R2 plots following calibration

Hi Jürgen, Thank you, that was helpful, though we now hit a new barrier. We edited the source file as your recommended (using 10-20 names, setting the transmitchan list to 1:32), and stopped recording from the trigger (sourcech = the 32 EEGlocs), and that seems to have made our plots a bit better. A...
by kpitt
08 Jun 2020, 17:35
Forum: Data Analysis
Topic: R2 plots following calibration
Replies: 22
Views: 3139

Re: R2 plots following calibration

Hi Jürgen, Thanks for the response! I was a little confused on why you are only noting activity on Fz/F3/F7? I did not see an option on the BCI2k offline analysis tool to exclude any non EEG channels from the R2 plot, so I was thinking that was done automatically and that this just included the 32 E...
by kpitt
08 Jun 2020, 17:21
Forum: Configuration
Topic: Semi transparent stimuli and checkboard flash patterns
Replies: 2
Views: 575

Re: Semi transparent stimuli and checkboard flash patterns

Thanks! i will look into this, and let you know if we want to pursue the checkboard. One step at a time :)
by kpitt
07 Jun 2020, 22:02
Forum: Data Analysis
Topic: R2 plots following calibration
Replies: 22
Views: 3139

R2 plots following calibration

Hi everyone Sorry to post again. I was wondering if I could get some feedback on the r2 plots we got following calibration. I attached some of the config details below, but can provide more if helpful. I was wondering, 1) Do you know why on the no ref R2 plot from the BCI2000 offline analysis tool w...
by kpitt
06 Jun 2020, 22:38
Forum: Configuration
Topic: Semi transparent stimuli and checkboard flash patterns
Replies: 2
Views: 575

Semi transparent stimuli and checkboard flash patterns

Hi, I am in the process of setting up the BCI2000 with P300 face speller paradigm, and had a couple of questions - 1) I was wanting to implement a semi transparent face flash paradigm that allows the grid letter/item to be seen behind the face when flashing. However, when I upload a semi-transparent...