How is Alzheimer's disease diagnosed?

A full medical examination is the correct method for diagnosing Alzheimer's disease because it encompasses a comprehensive approach to accurately assess the individual's cognitive function and overall health. This examination typically includes a review of the patient's medical history, a physical examination, and cognitive assessments done through various tests.

Additionally, other diagnostic tools may be employed during this full examination, such as cognitive tests, neurological exams, and, if necessary, brain imaging techniques like MRI or CT scans to rule out other conditions or to observe any physical changes in the brain. Relying solely on psychological tests, brain imaging, or patient self-reports would not provide the comprehensive evaluation needed for an accurate diagnosis, making the full medical examination the most effective option in diagnosing Alzheimer's disease.