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Yes, it does... On Wed, 3 Apr 2019 at 12:07, Julian Macoveanu <[log in to unmask]> wrote: > Thanks Anderson. I see that Woo argues for 3.1. Paradigms with complex > cognitive tasks though, don't really come up to that significance level. > Does the random field theory hold at 2.3? > > Best, > Julian > > On Wed, 3 Apr 2019, 17.25 Anderson M. Winkler, <[log in to unmask]> > wrote: > >> Hi Julian, >> >> The default is now 3.1. The paper by Woo et al (Neuroimage, 2014) made a >> good case for that. I don't think the threshold level was on its own right >> a cause for increased amount of false positives in any tool that was >> assessed, although too low thresholds do indeed create problems (the random >> field theory stops working, for example). >> >> All the best, >> >> Anderson >> >> >> On Wed, 3 Apr 2019 at 05:31, Julian Macoveanu <[log in to unmask]> >> wrote: >> >>> Dear FSL experts, >>> >>> In the light of the Eklund papers, I was wondering what is the >>> recommended cluster forming threshold for group level estimation using the >>> FLAME1(+2). >>> >>> I think the default is z=2.3 and that 80% of FSL papers use this >>> according to the latest survey doi.org/10.3389/fnhum.2018.00016, but >>> Eklund and others argues for 3.1. However, they use an older FSL >>> version 5.07 and 5.09 and z=3.1 is more a general recommendation for >>> least-square based estimations methods, and not sure to what degree it >>> should applied to FLAME which is a much fancier mixed-effect model >>> estimation. >>> >>> It is easy to recommend a more stringent CFT, but 3.1. seems rather >>> conservative using FLAME and looks to me to result in high false negative >>> rates. >>> >>> The question is, what CFT in the current FSL version should we choose >>> to get a rate of 5% false positive rate that we want to accept at corrected >>> p<0.05. >>> >>> All the best, >>> Julian >>> >>> ------------------------------ >>> >>> To unsubscribe from the FSL list, click the following link: >>> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1 >>> >> >> ------------------------------ >> >> To unsubscribe from the FSL list, click the following link: >> https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1 >> > > ------------------------------ > > To unsubscribe from the FSL list, click the following link: > https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1 > ######################################################################## To unsubscribe from the FSL list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/webadmin?SUBED1=FSL&A=1