<div>Hi all,<br></div><div></div><div>Our group has EEG time-series data collected with a BioSemi ActiveTwo 128-electrode cap. Our paradigm includes a Go-NoGo, with an alerting stimulus (S1) preceding the presentation of the Go-NoGo stimulus (S2). S1 and S2 are separated by 3 seconds. When we examine ERPs from single electrodes, we observe a typical contingent negative variation (CNV). However, when we run ICA (runica), none of the components isolate the CNV. We've tried highpass filtering at 0.5hz (obviously to high), 0.01hz and without any highpass filtering, all without success. Has anyone else run into a similar problem? Does anyone have any additional advice for isolating a CNV with ICA?</div>
<div></div><div>Thanks,</div><div>Keith Yoder</div><div>--</div><div>Research Assistant</div><div>Belmonte Autism Lab</div><div>Cornell University</div>