Researchers at the University of California-Berkeley’s School of Information claim to have devised a method to accurately differentiate the brainwaves of specific subjects as they visualized songs, images, or other mental tasks. The researchers used a commercially available EEG reader that retails for less than $100 from NeuroSky. The device uses a “dry connection” via a sensor placed on the forehead. It kind of resembles a hands free wraparound phone headset, except that the microphone is snuggled against your forehead rather than in front of your mouth.”]