The invention provides methods and apparatuses for monitoring task engagement by measuring beta frequency oscillations in the brain. Changes in power, frequency, and/or coherency of beta frequency oscillations correlate to an individual's engagement in or disengagement from a task. Accordingly, beta frequency oscillations can be used to determine if an individual prematurely disengages from a task, to diagnose if a person has a disorder affecting task engagement, and to evaluate the efficacy of a treatment for a disorder.
MONITORING TASK ENGAGEMENT USING BETA OSCILLATIONS