A method testing executive functioning of a subject includes determining
the subject's performance ceiling for performing at least one task and
then measuring the subject's efficiency at performing the task at a
difficulty level just below the performance ceiling, first without
additional distractions and then with additional distractions. The
subject's executive functioning is then determined by comparing the
subject's efficiency without additional distractions to the subject's
efficiency with additional distractions. In one embodiment, the method
can be implemented in a game-like format.