1. A system for interfacing with a computing device comprising: one or more near infrared sources configured to emit infrared radiation on a first portion of a cortical region; one or more detectors configured to receive infrared radiation indicative of a level of oxygenated hemoglobin and a level of deoxygenated hemoglobin of a second portion of the cortical region; the computing device configured to provide feedback to the person based on one or more of the level of oxygenated hemoglobin and the level of deoxygenated hemoglobin in the second portion of the cortical region; and the computing device configured to correlate that a change in the levels of oxygenated hemoglobin and deoxygenated hemoglobin with a change in the feedback.