Symptoms Alzheimer’s Diagnosis When you notice changes in your loved one’s cognitive abilities, it is important to get an accurate diagnosis. Ruling out causes of memory disruptions other than Alzheimer’s is important because some causes are treatable and possibly reversible. Alzheimer’s Tests When your loved one reports memory problems, your doctor will do a complete evaluation that will likely include one or more of these tests. Alzheimer’s Scales What does it mean when someone is described as Stage 6 Dementia? Likely this refers to either their level of cognitive function as scored on the Global Dementia Scale (GDS); or their level of functional ability as scored on the Functional Assessment Staging Test (FAST).