HelloCustomer- thanks for visiting,
There is a whole battery of tests that may be applied, but here are some examples:
Rating Scale, whick examines basic ares of function cush as initiation, concentration and construction. Even if there are problems in multiple areas, and dementia is suspected, this test on its own mean that a person is incompetent - the degeneration shown would have to be fairly sever to draw that conclusion.
The Cognitive Competency Test complements the DRS and seeks to evaluate performance in 8 different areas of ability.
The Mini Mental Stae Exam is thought of as being auseful cognitive test, and is commonly used in assessment.
Other tests seek to measure performance in deductive skills, memory and other imortant functions.
All of these tests have some value, but it must be remembered that that the environment in which they are often performed is somewhat artivifial. The person being assessed might behave and perform differntly in their own home for example, so tests are only part of the anser.
Different clinicians seem to favor some tests over others, so I suggest you talk to the clinician who may be involved to find out what his approach is.