Software Validation Study-Cognitive Status Indicator

Up to 600 subjects (and informants) may be enrolled and have a brain scan, cognitive, and blood assessments collected: Visit 1-Screening: -Salzburg (SDTP)- remote via telephone or video visit Visit 2/3-Evaluations: * EEG Scan (brain scan) * Mini-Mental State Exam (MMSE)-at home visit * Functional Assessment Staging Tool (FAST)- at home via video visit * blood- Amyloid Beta 42/40 ratio, p tau- at laboratory or home visit There are three instances of subject engagement with the study team after informed consent. One, during screening which may be a remote visit and and two different home or remote visits (or laboratory visit). The study participation ends when all of the assessments have been collected. The total duration of subject participation should be no more than 2-3 days within a 90 day period. The output of the investigational software used in the analysis to determine a identification of cognitive and Alzheimer's status based the data from the EEG scan shall be compared to the identification of cognitive and Alzheimer's status from a group of dementia specialists forming an Adjudication Committee which shall review all data (except for investigational device output).