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Kevin comments on What are you working on? June 2012 - Less Wrong
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From my experience: Mindwave has unusually good algorithms for filtering out blinks and facial movements, but the utility of a single electrode EEG is limited. Larger EEG arrays don't have algorithms as good at filtering out blinks and facial movements.
Thanks! I think you're right. I found a program that gave me "raw" EEG signals from Mindwave at different bands (theta, gamma...) and blinks and muscle movements caused huge spikes. But the Neurosky attention/meditation metrics were relatively unaffected. Unfortunately, this is a wheel I'll have to re-invent to extract good signals. (I assume so, since neurosky's metrics are proprietary.) Though I hope some literature exists about this.