[Homer-users] Export Mean Results question

[Yucel, Meryem A.]

Hi Elizabeth,

First of all, as a reminder, you should have stim marks only at the start of your stimulus (not at the start and at the end). Then when you are running block average or GLM, you enter a trange eg -2 20 for HRF estimation. This is telling HOMER that the baseline starts 2 seconds before stimulus onset. The tmin and tmax should match this timing. That is, it is the HRF time range not the whole protocol. For example if you want to average the HRF peak for a 10 second long stimulus,  you can input 5  and 15, then homer will average HRF between this time range and export those means into an excel file.
Hope this helps. Please let me know if you have further questions.

Meryem


________________________________
From: homer-users-bounces at nmr.mgh.harvard.edu [homer-users-bounces at nmr.mgh.harvard.edu] on behalf of Lyde, Elizabeth [elizabeth.lyde at mavs.uta.edu]
Sent: Monday, July 03, 2017 2:55 PM
To: moi moi
Subject: [Homer-users] Export Mean Results question


Hello all,


I'm hoping someone may help better understand the 'Export Mean Results' function in HomER.  The function will ask for a tMin and a tMax value; however, I am unsure what to input.


When I tried to input my entire protocol length (i.e. 0-360 s) I get an error saying 'tMax is outside the tHRF range'. I then put in the range of time that I used for my block average (i.e. -40- 75s) but I do not know if HomER is differentiating between my stimuli (i.e. baseline v. tapping) when I do this.


I would appreciate any insight or information about this function.


Many thanks,

Elizabeth

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.nmr.mgh.harvard.edu/pipermail/homer-users/attachments/20170706/527c37c6/attachment.html