[Mne_analysis] Source Space Decoding Classification Timecourse

Cushing, Cody CCUSHING1 at mgh.harvard.edu
Fri Aug 4 17:11:01 EDT 2017
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Hi,

I've been trying to modify the following example:

http://martinos.org/mne/dev/auto_examples/decoding/plot_decoding_spatio_temporal_source.html

to yield a time resolved classification accuracy.  I'm new to decoding so I've done it in a fairly brute way (just iterating this script over every time point), which yields a fairly convincing classification accuracy timecourse.  However, I'm a bit concerned at how high the accuracy is during the baseline, pre-stim period.  See attached for the modified script using the sample data and an example of the output.  I'm new to decoding, but the best answer I've been able to find for abnormally high pre-stim accuracy is failing to cross validate, but that shouldn't be the case as cross validation is being performed (but perhaps I'm doing it wrong) .  Is there something improper about my strategy here?  Thanks for any input.

Cheers,
Cody
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