>>12338271A objective time-proof test should be developed. So many tests in medicine relies on self-reports and as you say compensatory behaviors can develop without anyone's awareness until it is too late to effectively treat the condition.
I know dystonia sufferers have an app (MyDystonia) entirely based on subjective reporting for a condition that is heavily dependant on outer stimuli's. How can that be helpful to anyone?
I guess locomotion and word usage is what first can reveal ongoing degradation of the brain, if so locomotion sensors and language processing software would be the best way to identify and trace the condition before it is even apparent to sufferer or her surrounding.