Alzheimer's Dementia: Performance on parallel forms of the Dementia Assessment Battery

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Abstract
Fifty-four patients with Alzheimer''s disease performed on the Dementia Assessment Battery that comprised of finger tapping, forward digit span, naming, verbal memory, visual memory, Token Test, digit cancellation, word-list generation, symbol-digit substitution, and copying geometric designs. Four forms of the battery were administered at weekly intervals. The equivalence of the forms, the relative difficulty of the tests, retest reliability, and factorial composition of the battery are presented. Performance improved with repetition. Impairments in visuo-spatial and verbal abilities were independent of each other. The fragility of the patients'' working memory was identified as a main cause for their pool recall. The importance of "component analysis" in individual assessment is illustrated.

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