It looks like the released HCP task fMRI data were produced using an older 
version of the Task analysis pipeline that does not automatically collate the 
beta maps into a labeled and easy to use dscalar file.  The beta maps will be 
in these files:

 where ${i} = 1 to N contrasts



 on behalf of Vadim Axelrod <<>>
Date: Sunday, October 16, 2016 at 7:31 AM
To: Stephen Smith <<>>
Cc: "<>" 
Subject: Re: [HCP-Users] Extracting beta values from analyzed task-data

Thank you Stephen for the prompt reply.
But why there is only one pe1 file with only one volume in it? For the contrast 
like,  story > math  I would expect to find two beta images, one for the 
"story" and one for the "math".  In addition, the pe1.dtseries.nii maps are 
very correlated with tstat1.dtseries.nii (R>0.85) and there is similar 
correlation for all contrasts of the same task/subject.

On Sun, Oct 16, 2016 at 2:09 PM, Stephen Smith 
<<>> wrote:
HI - "pe" are the beta files and "cope" are contrasts of these.

On 16 Oct 2016, at 12:03, Vadim Axelrod 
<<>> wrote:

Dear list,

I downloaded the analyzed 3T HCP fMRI task-data. In the cope* subfolders I can 
find the outputs of the contrast calculation, e.g., Zstat1.dtseries.nii. 
However, I do not see beta estimates for each regressor. Do I miss something or 
they are just not included in the analyzed archive. If the latter is correct, 
should I download non-analyzed data and run the analysis myself? What is the 
simplest way to to that? The only instructions that I found are from the last 
year course, and I am not sure how valid they are:

Probably someone can post more recent instructions from the last month course.

Many thanks for the help,

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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<tel:%2B44%20%280%29%201865%20222726>  (fax 222717)<>

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