Dear Sir,
We have several reviewer questions that I would kindly ask your assistance with and which relate to the use of your very valuable DPARSF toolbox.
1)Using DPARSF we have bandpass filtered at 0.01-0.1 Hz. The reviewer requested to precisely state the 'type of filter". Was the filtering based on a 'discrete cosine transform' as done in SPM with the given frequencies used as cut-off?
2) the other reviewer question was this: "How many degrees of freedom were left in the data after preprocessing"? I am a little lost with this question. We regressed the white matter, CSF and the global signal ( and selected the 'Friston 24'). We also selected the Head motion scrubbing regressors. The reviewer question was " how was this motion evaluated? Was it done via frame wise displacement (Power et al, 2014)?
I very much appreciate your help answering these comments.
With kind regards,
Catherine Chong
From: The R-fMRI Network >
Reply-To: The R-fMRI Network >
Date: Thursday, August 13, 2015 6:27 AM
To: "rfmri.org@rnet.co" >
Subject: [RFMRI] a basic question about alff
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By fish (fish)
Dear Dr. Yan,
Sorry to bother you some basic questions, I want to know what I will get after two-sample t-test by using ALFF, the data I uesd mALFF. Second, if I used VOI in spm to extract significant value from two-sample t-test by using ALFF, what's the value represent? Third, if I have used covariates such as gender in the two-sample t-test, after that I extracted value to do correlation, should I use partial correlation, I mean regress out gender covariates again? or only correlation?
Any helpful advice will be highly appreciated!
Best
fish
Online version of this post: http://rfmri.org/content/basic-question-about-alff
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