Re: [SPM] A question about % signal change in MarsBaR

Hi,

On Wed, Jan 20, 2010 at 3:04 AM, fenglu <fenglu <at> fingerpass.net.cn> wrote:
> Hi, Matthew. Thank you for help. I think I have got to know how to compute % signal change.
> First, when we compute fitted time course, the time course due to an event is averaged between sessions.
Second, we got the value of top half signal for this time course as 'd'. Then 'd' is divided by mean of the
session and we got a 's'. Last, we average the 's's across a session.
> All the calculations above is voxel-based.

Nearly - the fitted time courses are per-session, and then divided by
their own session means, then, if you've selected to get signal change
across sessions by combining events, these are averaged to get the
final result,

Best,

Matthew

------------------------------------------------------------------------------
Throughout its 18-year history, RSA Conference consistently attracts the
world's best and brightest in the field, creating opportunities for Conference
attendees to learn about information security's most important issues through
interactions with peers, luminaries and emerging and established companies.
http://p.sf.net/sfu/rsaconf-dev2dev