Walter Reed Army Medical Center

The sensitivity of the Paced Auditory Serial Addition Task (PASAT) to working memory deficits may be enhanced by examining “dyads ” (i.e., correct responses immediately pre-ceded by a correct response) as a complement to the traditional total correct summary score. In a sample of 397 mostly African American (79%) healthy adults, total dyad and total correct scores were highly correlated (r =.96, p <.001); however, the magnitude of this association diminished in faster stimulus presentation trials, particularly among par-ticipants with impaired working memory abilities