[Eeglablist] Performining the t-test and highiliting the area

[Alex Davila]

Dear Vijaya,
 
I assume that your two conditions are run on the same participants (repeated measures). Then, what you need to do is just this:
 
1. Define the variable D = C - I
 
where C: your variable for the congruent condition and I: your variable for the incongruent condition.
 
2. Calculate the mean M and the sample standard deviation S for D.
 
3. Calculate t = M/(S/rootsquare(N))
 
where N: your number of participants.
 
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.
 
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.
 
6. Of course, before getting this data, you need to apply the standard averaging procedure to extract the ERP signal from the noise.
 
All the best,
 
Alex.     
 



Date: Fri, 11 May 2012 10:24:26 +0530
From: vijaynarne at gmail.com
To: eeglablist at sccn.ucsd.edu
Subject: [Eeglablist] Performining the t-test and highiliting the area



Dear List,
 
            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.
 
Thanking you
 
Vijay
-- 
Vijaya Kumar Narne PhD,
India


_______________________________________________ Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html To unsubscribe, send an empty email to eeglablist-unsubscribe at sccn.ucsd.edu For digest mode, send an email with the subject "set digest mime" to eeglablist-request at sccn.ucsd.edu 		 	   		  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20120514/d20bc3ac/attachment.html>