Re: [HCP-Users] Same data / Multiple comparisons ?

2016-09-20 Thread Krieger, Donald N.
Nichols Cc: Krieger, Donald N.; hcp-users@humanconnectome.org Subject: Re: [HCP-Users] Same data / Multiple comparisons ? Hi Tom actually the MegaTrawl latest version is here: https://db.humanconnectome.org/megatrawl/index.html But yes indeed - early on within the HCP we discussed options for trying

Re: [HCP-Users] Same data / Multiple comparisons ?

2016-09-14 Thread Stephen Smith
hic measure in the HCP. See also the OHBM COBIDAS report > <http://www.humanbrainmapping.org/cobidas/>, which implores authors to be > completely transparent in variables and hypotheses considered but not > necessarily highlighted in a publication. > > -Tom > > > &g

Re: [HCP-Users] Same data / Multiple comparisons ?

2016-09-14 Thread Thomas Nichols
il.com [mailto:ten.pho...@gmail.com] *On Behalf Of > *Thomas > Nichols > *Sent:* Tuesday, September 13, 2016 10:53 AM > *To:* Krieger, Donald N. > *Cc:* hcp-users@humanconnectome.org > *Subject:* Re: [HCP-Users] Same data / Multiple comparisons ? > > > > Dear Don, &

Re: [HCP-Users] Same data / Multiple comparisons ?

2016-09-13 Thread Thomas Nichols
Dear Don, There are no simple answers to this question. Firstly, always be totally transparent about the set of questions/contrasts you're investigating when you write up your results. But, when it comes to decide over what set of results to control multiple testing, I don't think you need to

[HCP-Users] Same data / Multiple comparisons ?

2016-09-13 Thread Krieger, Donald N.
Dear List, When a lab analyzes their own data, they control for the degradation in confidence due to multiple comparisons. But how does that work when you have many labs analyzing the same data? At the one end, several labs could do exactly the same analysis and get the same results. At the