[Homer-users] Block averaging

[Meryem Ayse Yucel]

Hi Eugenio,

What is your filtering range?
Also your stimulus vector s should only have 1's at the onset of the
stimulus, not throughout it, can you check that?

Meryem



> Dear Homer2 community,
>
> I am new to Homer and relatively new to NIRS.
>
> I do not understand the following. I am able to process my file with
> Homer2 (v 1.3). What I get (concentration of Oxy) is displayed in the
> attached figures (Time course.eps and Time course + Stim.eps, this second
> plot just showing the stimuli onset and offset). What I get looks good to
> me and it is congruent to what I was getting with other softwares. However
> when I look at the block average (Average.eps) I really do not understand
> what is going on. Namely I do not see how is it possible to get such an
> average curve from that time course. To me that does not look as an
> average coming from my concentration data.
> Can you please help me to understand? What does Homer2 does when computing
> and/or plotting the block average?
>
> Thank you!
> Eugenio
>
> Eugenio Parise, Ph.D.
> Cognitive Development Center - Central European University
> Hattyú utca 14, 1015 Budapest, Hungary
> Phone: +36 1 88 333 41
> Mobile: +36 70 225 5020
> Fax:     +36 1 88 333 48
> http://web.me.com/babakutato/babakutato/Munkatársak/Munkatársak.html
> http://www.ceu.hu/profiles/research-fellow/eugenio_parise
>
>
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