Does someone know about any study where they measure reliability across resting state in different sessions? I wanted to know to what extent measures (i.e functional connectivity) in resting state differs in the same person, for example different days.
This question is studied in detail in different laboratories. Please study the two manuscript in Attachment.
This is also an interesting read:
https://www.sciencedirect.com/science/article/pii/S0896627318302411
I'd suggest also this two articles, multi-session and multi-site, and differente FC measures:
Article Influences on the Test-Retest Reliability of Functional Conn...
Article Multisite Reliability of MR-Based Functional Connectivity
As longer the run the better the reliability.
I think the best answer is given by the myconnectome project by Russ Poldrack:
http://myconnectome.org/wp/
You also might want to check out this paper by the MSC: http://linkinghub.elsevier.com/retrieve/pii/S089662731730613X
Here is another interesting paper that is related to your question - how do group level findings relate to indiviudal data? It shows that the variance in individuals is up to four times larger than in groups.
http://www.pnas.org/content/early/2018/06/15/1711978115
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