<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 10pt;
font-family:Tahoma
}
--></style></head>
<body class='hmmessage'><div dir='ltr'>
Dear Vijaya,<BR>
<BR>
I assume that your two conditions are run on the same participants (repeated measures). Then, what you need to do is just this:<BR>
<BR>
1. Define the variable D = C - I<BR>
<BR>
where C: your variable for the congruent condition and I: your variable for the incongruent condition.<BR>
<BR>
2. Calculate the mean M and the sample standard deviation S for D.<BR>
<BR>
3. Calculate t = M/(S/rootsquare(N))<BR>
<BR>
where N: your number of participants.<BR>
<BR>
4. Depending on your hypothesis, compare your calculated t with a one tail or two tail table t-student value. I'd suggest to use an alpha value identical to those available in the relevant literature.<BR>
<BR>
5. As you're interested in the N400 value, I assume you may extract it from your ERP data of potentials across the time domain where you may identify local maxima and minima for each participant.<BR>
<BR>
6. Of course, before getting this data, you need to apply the standard averaging procedure to extract the ERP signal from the noise.<BR>
<BR>
All the best,<BR>
<BR>
Alex. <BR>
<BR>
<DIV>
<DIV id=SkyDrivePlaceholder></DIV>
<HR id=stopSpelling>
Date: Fri, 11 May 2012 10:24:26 +0530<BR>From: vijaynarne@gmail.com<BR>To: eeglablist@sccn.ucsd.edu<BR>Subject: [Eeglablist] Performining the t-test and highiliting the area<BR><BR>
<DIV dir=ltr>
<DIV>Dear List,</DIV>
<DIV> </DIV>
<DIV> I am Vijaya Kumar Narne, PhD. We are running the experiments on N400. We would like to compare ERP of the congruent and incongruent condition. We are intrested in running t-test and highliting the area of N400 in EEGLAB. As we are new to EEGLAB, if any one help us do this.</DIV>
<DIV> </DIV>
<DIV>Thanking you</DIV>
<DIV> </DIV>
<DIV>Vijay<BR clear=all><BR>-- <BR>Vijaya Kumar Narne PhD,<BR>India<BR><BR></DIV></DIV><BR>_______________________________________________ Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html To unsubscribe, send an empty email to eeglablist-unsubscribe@sccn.ucsd.edu For digest mode, send an email with the subject "set digest mime" to eeglablist-request@sccn.ucsd.edu</DIV> </div></body>
</html>