Re: [Freesurfer] How FDR was used to correct for multiple comparisons

2018-04-19 Thread Douglas N. Greve
Yes, that looks right. It is the basic FDR computation On 04/18/2018 12:53 PM, Livia Liu wrote: > > Dear Douglas, > > Thank you for your reply. I read the related FDR paper given in the > “mri_fdr –help”. > > Please tell me if the FDR correction in FreeSurfer do like the below. > > For the V

Re: [Freesurfer] How FDR was used to correct for multiple comparisons

2018-04-18 Thread Livia Liu
Dear Douglas, Thank you for your reply. I read the related FDR paper given in the “mri_fdr –help”. Please tell me if the FDR correction in FreeSurfer do like the below. For the V vertices being tested, the general procedure is as follows: (1) Select a desired FDR bound q between 0 and 1. This

Re: [Freesurfer] How FDR was used to correct for multiple comparisons

2018-04-17 Thread Douglas Greve
You should read the FDR paper for more detail. But the FDR is the number of false positives relative to the total number of positives. The way it is interpreted is that when you look at an image, 5% of the voxels above threshold are false. You don't know which 5%. If the 5% came out of a big

Re: [Freesurfer] How FDR was used to correct for multiple comparisons

2018-04-16 Thread Livia Liu
Dear Douglas, Thank you for your reply. I run “mri_fdr –help” to get docs that include some information for how to use this command. However, I still don’t know how FDR was used to correct for multiple comparisons. This question is an opinion given by one reviewer, and I really don’t know how

Re: [Freesurfer] How FDR was used to correct for multiple comparisons

2018-04-16 Thread Douglas N. Greve
You can also use mri_fdr Run  it with --help to get docs On 04/16/2018 10:23 AM, Livia Liu wrote: > > Dear FS experts, > > I'd like to know that how FDR was used to correct for multiple > comparisons. I do FDR correction in two way in FreeSurfer. > > 1, Do the FDR correction in the qdec tool.

[Freesurfer] How FDR was used to correct for multiple comparisons

2018-04-16 Thread Livia Liu
Dear FS experts, I'd like to know that how FDR was used to correct for multiple comparisons. I do FDR correction in two way in FreeSurfer. 1, Do the FDR correction in the qdec tool. And the page of “False Discovery Rate” in the page “Multiple-Comparisons Correction in Qdec” was lost. 2, Use