 - You will have an electroencephalogram EEG to check your brains electrical activity. During the EEG, a snug cap with small electrodes will be placed on your head to measure the electrical patterns coming from the brain. This is like the way a doctor listens to your heart from the surface of your skin. During the EEG, you will complete 3 tests to check your attention, short-term memory, and levels of emotions on the computer. The study staff will discuss each test in more detail with you. The EEG and tests will take about 45-60 minutes total. 