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I stumbled upon the consumer EEG Melon (at Kickstarter). It has three electrodes and is advertised as measuring how "focused" you are. In the FAQ it says:

The Melon headband has three electrodes. Our primary electrode is on the forehead region known as FP1, where Melon can monitor brainwave activity from the prefrontal cortex.

I wonder: What can I measure with such an EEG? What applications would be unlikely?

  • How can "focus" be quantified?
  • Would it be possible to identify (different) states of sleep?
  • Could it be possible to control a cursor/game (left/right movements)?
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Traditionally, sleep stages (according to Academy of Sleep Medicine criteria) are scored based on C3/C4 and O1/O2. Information from the frontal pole would provide some insight, but, as with any consumer EEG product, you're going to get mainly the muscle activity (EMG)of the forehead anyway. –  Chuck Sherrington Jun 9 '13 at 23:24
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I've built a prototype of pong game using another commercial EEG headband, but for the most part the cursor moved in response to facial movements - if I twitch my eyebrows, it will go up. It's very hard to play like that for longer than a minute. I found "attention" metric to be fairly useless and random. –  Alex Stone Jun 10 '13 at 10:05
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