<div dir="ltr">Dear Carla,<div><br></div><div>> Based on your experience, what would be your recommendation for the baseline correction method (we are using the subtraction method)?<br></div><div class="gmail_extra"><br></div><div class="gmail_extra">When we analyze ERSP (i.e., trial-averaged wavelet transform), we convert all the values into dB (20*10logX) and subtract the mean across baseline period from all datapoints.</div><div class="gmail_extra"><br></div><div class="gmail_extra">> it is difficult to get a sense of what should be the right range<br></div><div class="gmail_extra"><br></div><div class="gmail_extra">That's an interesting point. I don't see raw values for power.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Makoto</div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Aug 10, 2015 at 8:19 AM, Carla Barros <span dir="ltr"><<a href="mailto:carla.88.barros@gmail.com" target="_blank">carla.88.barros@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear all,<br><br>We have been trying to calculate total, evoked and induced power related to auditory processing in an oddball task.<br><br>Power has been calculated as the squared magnitude of the EEG (μV2), followed by baseline correction, following Roach and Mathalon (2008) and others. However, the resulting values have been intriguing us, since they vary between 0 and 400 μV2. Based on the existing studies, it is difficult to get a sense of what should be the right range, since many do not report the measurement unit and others refer to power as μV and not as μV2.<br><br>Based on your experience, what would be your recommendation for the baseline correction method (we are using the subtraction method)?<br><br><br>Thank you very kindly in advance.<br><br>Best regards,<br>Carla Barros, MS.C., Biomedical Engineer</div>
<br>_______________________________________________<br>
Eeglablist page: <a href="http://sccn.ucsd.edu/eeglab/eeglabmail.html" rel="noreferrer" target="_blank">http://sccn.ucsd.edu/eeglab/eeglabmail.html</a><br>
To unsubscribe, send an empty email to <a href="mailto:eeglablist-unsubscribe@sccn.ucsd.edu" target="_blank">eeglablist-unsubscribe@sccn.ucsd.edu</a><br>
For digest mode, send an email with the subject "set digest mime" to <a href="mailto:eeglablist-request@sccn.ucsd.edu" target="_blank">eeglablist-request@sccn.ucsd.edu</a><br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div><div dir="ltr">Makoto Miyakoshi<br>Swartz Center for Computational Neuroscience<br>Institute for Neural Computation, University of California San Diego<br></div></div>
</div></div>