The OpenEEG project is about creating a low cost EEG device. Electroencephalography (EEG) is the measurement of electrical activity produced by the brain as recorded from electrodes placed on the scal... More
Many people think you can tell a lot about a person's subconscious thought by measuring various bodily functions including heart rate, blood pressure, and muscle tension (think polygraph machines).
Whether you believe that biofeedback technology is cutting edge, interesting to ponder, or just a lot of hooey, there are a few biofeedback apps for Linux users who want to explore the concept.