Re: [Freesurfer] retinotopy betas

2013-06-27 Thread Douglas N Greve
The first 12 regressors are 1 and 2: fundamental real (cosine), fundamental imaginary (sine) 3 and 4: 1st harmonic real and imag 5 and 6: real and imag at a freq just below the fundamental 7 and 8: real and imag at a freq just above the fundamental 9 and 10: real and imag at a freq just below the

[Freesurfer] retinotopy betas

2013-06-25 Thread dgw
Hi, I am examining the affect a metal artifact has on fMRI data, and I am using Eccentricity mapping with the retinotopy analysis in FSFast. I was recently asked to switch from examining the difference in the fsig to examining the difference in the betas. I opened up beta.nii.gz and I can see that

[Freesurfer] retinotopy betas

2013-06-24 Thread dgw
Hi, I am examining the affect a metal artifact has on fMRI data, and I am using Eccentricity mapping with the retinotopy analysis in FSFast. I was recently asked to switch from examining the difference in the fsig to examining the difference in the betas. I opened up beta.nii.gz and I can see that