[FieldTrip] .avg field in GA structure for interaction test

Mariya Manahova m.manahova at gmail.com
Tue Jul 3 11:26:10 CEST 2018

Hi Paul,

With keepindividual = 'yes', your parameter of interest is 'individual'. So
try using cfg.parameter = 'individual' (instead of cfg.parameter = 'avg'
which is probably the default) and that should work.

All the best,

On Sun, Jul 1, 2018 at 8:11 PM Paul Dhami <pdhami06 at gmail.com> wrote:

> Hi Fieldtrip,
> I am following the tutorial 'How to test an interaction effect using
> cluster-based permutation tests?' for my own dataset. It says to compute
> the GA for each condition (my design is 2x2 so a total of 4 GA structures)
> with keepindividual set to 'yes'. However, when making the difference
> structures, it says the assignment to the difference structure should be
> made using the .avg field from 2 of the previous GA structures. But with
> the keepindividual set to 'yes', I am getting no .avg field in these GA
> structures to be used. Any advice as to how solve this issue?
> Best,
> Paul
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> https://doi.org/10.1371/journal.pcbi.1002202
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