The validation of aphasia tests
A brief history is provided of Aphasia testing. The test
batteries published since 1947 are described under the following
formal headings: theory and classification, organisation,
quantification, charting and interpretation, and standardisation
and factor analyses.
A component analysis of the forty aphasia test batteries is
conducted. The most frequently used subtests are identified and
divided into subgroups of tests, tests of auditory comprehension,
oral language, naming, reading comprehension, speech production,
written language and non-language tasks.
The fifty most frequently used subtests are then applied to
a group of normal elderly people to establish baseline norms.
Then 108 diagnosed aphasic patients are subjected to these
same tests, and the results analysed. The patient data, the
normal data and the tests thelllSelves are examined. Xethods of
analysis include factor analYSiS, discriminant analysis and
cluster analysis. Analysis of variance is applied to the elderly
normal subj ects and the aphasic patients, as well as to the
aphasic patients on repeated measures.
Conclusions are then drawn about how effective the most
frequently used subtests in aphasia batteries are in identifying
the degree and type of language disturbance in aphasic patients.