Nonparametric permutation tests

[tensionhead]

For multiple comparison testing, we want to implement the randomization and permutation testing strategies outlined in Nichols and Holmes.

In a typical application scenario we have two different conditions (attentive vs. non-attentive) in the data, and want to test for the significant difference of the coherence spectra. The necessary labeling can be achieved in Syncopy via the .trialinfo property.