Hi
On 16 Jan 2009, at 18:36, Hongyu Yang wrote:
> Dear FSL experts,
>
> I am trying to analyse my data with MELODIC. After tried one
> subject, I got
> 156 components.
> I am a little confused about the results. I just do not know which
> component
> is useful, which component is not. Perhaps I can judge them based on
> GLM
> results? The COPE with P< 0.05 should be right?
Yes, maybe
> Maybe the results has some
> problems, I am not sure. By the way, my time series model and time
> series
> contrasts ran well in FEAT, I just can not imagine MELODIC can not
> accept
> these parameters like FEAT.
the melodic GUI should accept the design.mat and design.con file - is
that not the case
>
> For my fMRI data has many varibles, I wonder how MELODIC can figure
> them out
> a lot of components according to the time course.
> I got some results on GLM (OLS) on time series at the same time,
> would you
> please explain them for me?
OK, so it did run the GLM (OLS) on the time series it seems. In this
case melodic will fit your design to the ICA time course (instead of
fitting it to a voxel's time series like in FEAT.
> What is the relationship between ICA and GLM?
This is too complex for the list I'm afraid - I suggest you start by
reading the relevant literature (some of it is referenced in the
melodic web page ;)
>
> Can I use MELODIC to do group analysis after the first level analysis?
>
For group analysis we recommend the concat -ICA or tensor-ICA models
cheers
Christian
> Thank you for your answers.
_______________________________________________
Christian F. Beckmann, DPhil
Senior Lecturer, Clinical Neuroscience Department
Division of Neuroscience and Mental Health
Imperial College London, Hammersmith Campus
Rm 419, Burlington Danes Bldg, Du Cane Road, London W12 0NN, UK
Tel.: +44 (0)20 7594 6685 --- Fax: +44 (0)20 7594 6548
Email: [log in to unmask]
http://www.imperial.ac.uk/medicine/people/c.beckmann/
Senior Research Fellow, FMRIB Centre
University of Oxford
JR Hospital - Oxford OX3 9DU
Tel.: +44 (0)1865 222551 --- Fax: +44 (0)1865 222717
Email: [log in to unmask]
http://www.fmrib.ox.ac.uk/~beckmann
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