Psychometric review of nine aphasia tests.

Nine aphasia tests are reviewed using six psychometric criteria appropriate to standardized tests. The number of criteria met by individual tests ranged from one to five, with a median and mode of three. A seventh criterion was applied to six tests that used normative data. Two of the six reviewed tests met that criterion. The need for test manuals to contain a wide range of psychometric information is discussed and, in particular, the role of subject description in test standardization is emphasized.