Print

Print

I too would like some clarification on this.

It’s my understanding that the role of pre-whitening time series is to reduce the inflated cross-correlations between series which each have auto-correlation structure.

The pre-whitening reduces or removes that auto-correlation structure providing more confidence in the reliability of “significant” cross-correlation findings.

That role I had thought would apply to resting recordings as well as task recordings.

Am I missing something?

 

From: FSL - FMRIB's Software Library [mailto:[log in to unmask]] On Behalf Of Stephen Smith
Sent: Friday, November 20, 2015 1:26 PM
To: [log in to unmask]
Subject: Re: [FSL] Prewhitening in resting-state fMRI

 

sorry - no - I'm not aware of any reason why it is necessary to do the whitening.

cheers

 

 

 

 

On 20 Nov 2015, at 18:15, Andrew Song <[log in to unmask]> wrote:

 

Thank you for the quick response.

Just to make sure that I understand it correctly, there is no reason NOT to do prewhitening in resting-state studies?

Thank you,

 


---------------------------------------------------------------------------
Stephen M. Smith, Professor of Biomedical Engineering
Head of Analysis,  Oxford University FMRIB Centre

FMRIB, JR Hospital, Headington, Oxford  OX3 9DU, UK
+44 (0) 1865 222726  (fax 222717)
[log in to unmask]    http://www.fmrib.ox.ac.uk/~steve

---------------------------------------------------------------------------

 

Stop the cultural destruction of Tibet