Re: [Freesurfer] selxavg3-sess, -svres

2015-08-17 Thread Xiaomin Yue
@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] selxavg3-sess, -svres They are not the same. As you point out they have a correlation of .98, not 1.0. What you are discovering is the inconvenient truth that task signal accounts for a very small proportion of variation

Re: [Freesurfer] selxavg3-sess, -svres

2015-08-17 Thread Douglas Greve
They are not the same. As you point out they have a correlation of .98, not 1.0. What you are discovering is the inconvenient truth that task signal accounts for a very small proportion of variation. Welcome to fMRI:). I think the reason why the residual does not equal y - X*beta is that they

[Freesurfer] selxavg3-sess, -svres

2015-08-09 Thread Xiaomin Yue
Hi Doug, In order to understand my data better, I did the following analysis. First, I did a full model analysis with all stimuli conditions included in the analysis using: mkanalysis-sess -fsd bold -paradigm xy_mky_category_eye_weights.par -event-related -refeventdur 1 -no-inorm -delay 0