HI Xinyang,

Yes, those in your list are definitely the Retest subjects. You'd probably want 
to use the first set if you are using other data for those subjects that was 
collected for the first (test) timepoint so that you don't introduce a possible 
systematic bias for the retest subjects.


Some subjects might not have all the data for all the different behavioral 
tests or imaging modalities for a wide variety of reasons. In general, we make 
the data we have available, even if incomplete.


Best,

Jenn

Jennifer Elam, Ph.D.
Scientific Outreach, Human Connectome Project
Washington University School of Medicine
Department of Neuroscience, Box 8108
660 South Euclid Avenue
St. Louis, MO 63110
314-362-9387<tel:314-362-9387>
[email protected]<mailto:[email protected]>
www.humanconnectome.org<http://www.humanconnectome.org/>


________________________________
From: Xinyang Liu <[email protected]>
Sent: Friday, June 29, 2018 6:38:24 AM
To: Elam, Jennifer
Cc: HCP 讨论组
Subject: Re: [HCP-Users] Repeated measurement in HCP outscanner behavioral data

Dear Jennifer,

Thanks a lot for your reply. So in this case, either set is ok to use, right? :)

Please find the subID list of the DCCS task attached. Apart from that, there is 
also a subject (No.341935) with 2 trials and a subject (No.638049) with 27 
trials.


Best regards,
Xinyang



At 2018-06-29 19:09:53, "Elam, Jennifer" <[email protected]> wrote:

Can you share a list of subjects where you see 60 trials for the DCCS task? 
Likely these subjects are HCP Retest subjects who went through the entire 
protocol twice (about 6 months or so between acquisitions, depending on the 
subject) and therefore have two sets of responses/imaging datasets.


Best,

Jenn


Jennifer Elam, Ph.D.
Scientific Outreach, Human Connectome Project
Washington University School of Medicine
Department of Neuroscience, Box 8108
660 South Euclid Avenue
St. Louis, MO 63110
314-362-9387<tel:314-362-9387>
[email protected]<mailto:[email protected]>
www.humanconnectome.org<http://www.humanconnectome.org/>


________________________________
From: 
[email protected]<mailto:[email protected]>
 
<[email protected]<mailto:[email protected]>>
 on behalf of Xinyang Liu <[email protected]<mailto:[email protected]>>
Sent: Friday, June 29, 2018 3:50:06 AM
To: HCP 讨论组
Subject: [HCP-Users] Repeated measurement in HCP outscanner behavioral data

Dear HCP experts,

Hi. We are looking at the HCP battery of behavioral measures. We found that in 
the recordings of individual performances, there are some participants who 
repeated the task for a second time. For example, in the Executive Function  
DCCS task (on manual page 183), there are 30 experimental trials apart from the 
practice part. However, the excel recording shows that some participants 
finished 60 trials. We would like to know what was the situation and does it 
mean the first round of measurement invalid? Thanks a lot.

Best regards,
Xinyang






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