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i'm dubious these things can accurately interpret anything more than face muscle tensions, eye-movement if that. which are common noise sources in EEG recordings

http://en.wikipedia.org/wiki/Electroencephalography#Artifact...

anyone have some anecdotes otherwise? the demos on youtube are not really satisfying.

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You can eliminate noise/artifact like that by subtracting it from a reference point.

but they don't seem to be doing that since "expressive" is one of the detection aspects they mention.

I think that's just "eyebrows went up, smiling muscles contracted, blinked", etc. for the look-my-emoticon-changed marketing effect. They also claim there's a gyroscope in the device.

The more advanced EEG tech is quite real. It's a stretch to say that it's interacting with your "thoughts" ... making something like PacMan move forward/backward is a similar sensation to when you first figured out how to wiggle your nose (the mental exercise, not the muscle movement).

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