[Eeglablist] How to compare and analyze frequency bands ?

[Pelle Krøgholt]

Hi,

A fellow student and I are doing some investigations/try outs with low
cost brain interfaces (MindWave, Epoc, OPI and possibly Muse).

We are trying out eeglab for some simple frequency analysis where we
are interested in 'the amount' of alpha with a recording either split
in multiple datasets and or a single dataset with 2 epochs.

With MindWave interface we only have one channel and have done a
simple relaxation exercise (2 minutes w. open eyes followed by 2
minutes w. closed eyes) - roughly we expect the last one to have more
alpha than the first one.

Which we also can see when we look of the power plots (
http://screencast.com/t/g7JRV0iuzV ).

We have looked through the fine eeglab tutorials / documentation and
have a question:

-> how do you recommend to compare and analyze alpha bands (9-11 Hz
etc.) between datasets and/or epochs within the same dataset?


The current script code look as follow:

eeglab_analysis_eyes_mindwave.m - 2 datasets
https://gist.github.com/pellekrogholt/5973833
screen shoot : http://screencast.com/t/g7JRV0iuzV


eeglab_analysis_eyes_mindwave_epochs.m - 1 dataset
https://gist.github.com/pellekrogholt/5973877
screen shoot : http://screencast.com/t/z59PAEMr


Any advises are appreciated ?

Pelle