Prevalence rates of cognitive impairment in persons 75 to 85 years of age have been documented in the range of 10-15%, and exceeding 20% after age 85. A recent study has demonstrated even higher prevalence rates: 18.7% between the ages of 75-84 and 47% in persons over 85 years of age. Screening for dementia in persons 75 years of age and older…

Basic Achievement Skills Individual Screener (BASIS) was designed by the Psychological Corporation to yield criterion-referenced information as well as normative scores. The constraints imposed by this dual purpose were increased by the requirements inherent in an individually-administered format and the short testing time consistent with test use…