Normative data for the Mattis Dementia Rating Scale

Age-adjusted normative data are presented for persons over age 55 on the Ma ttis Dementia Rating Scale. Additional adjustment for the effect of educati on on test performance is also provided. These data were collected as part of Mayo's Older Americans Normative Studies (MOANS) in a continuing effort to develop age-appropriate norms for older persons ron commonly used neurop sychological tests. The normative data presented here should prove more use ful in characterizing the presence and severity of general cognitive dysfun ction than currently available norms. Limitations and unique features of MO ANS normative data are also discussed.