In view of the lack of standardised psychometric procedures in establishing the cerebral efficiency of geriatric patients, it was attempted to develop an aptitude test for this group of patients. The "AUT" was tested on 140 patients at the 1st Medical Department of the Vienna-Lainz nursing home. The values examined, such as completion time, number of correctly cancelled figures, mistakes, as well as the combined result total amount and error percentage correspond, with regard to objectivity and reliability, with the requirements of psychometric procedures. Initial findings show the test to be a good indicator of "general cerebral efficiency" of those questioned, but it is to be noted that most of all the varying ability to concentrate, ability to remember, intelligence, orientation, activity and independence have an influence on the test results.