Dear Antanas,
On Sat, Aug 15, 2009 at 11:19 AM, Spokas
Antanas<[log in to unmask]> wrote:
> Dear SPM,
>
> Could you please explain:
> 1) What does number of temporal modes refer to in source activity time
> series plot when you access results via display/MEEG tab?
To make the algorithm more efficient it uses decomposition of the data
into spatial and temporal modes and discards the modes with very low
variance. The number of modes actually used is displayed in the
reviewing tool.
> 2) After inversion in the results plot, showing time course of the most
> activated area with its most intensity time point - What does dashed curves
> sarounding main activity curve mean - does it refer to estimation
> variance/confidence? Thank you so much.
>
In the Bayesian framework for every quantity that is estimated you get
its posterior probability density parametrized in terms of mean and
precision (variance). Therefore for the source activity you can get
its mean value and confidence intervals (in this case 95%).
Best,
Vladimir
|