This study is a pre-screening process used to assess participants' potential eligibility for Roche interventional Alzheimer's disease studies.

Inclusion Criteria:

- Report of objective or subjective memory concerns (by the participant and/or their informant) within the last year with or without a previous clinical diagnosis of MCI or dementia due to AD.

Exclusion Criteria:

• Dependency in basic activities of daily living (bADLs) due to cognitive impairment
• Visual or auditory impairment that would prevent them from performing the cognitive assessments (eyeglasses and hearing aids are permitted)
• Any self-reported evidence or known diagnosis of a neurological or neurodegenerative condition that may lead to cognitive impairment other than AD
• History of severe, clinically significant central nervous system trauma
• Any serious medical condition that precludes a participant's safe participation and completion of a clinical study