The Eight-item Informant Interview to Differentiate Aging and Dementia (AD8®) was developed as a brief instrument to help discriminate between signs of normal aging and mild dementia. The AD8 contains eight items that test for memory, orientation, judgment, and function. Cut points are: normal cognition 0-1; impairment in cognition 2 or greater. The AD8 assesses intra-individual change across a variety of cognitive domains compared to previous levels of function and is sensitive to early signs of dementia regardless of etiology. 

Permission & Licensing Policy

Please select from one of the following options to obtain the appropriate agreement:

I will be using AD8® for:

  1. patient care by a physician (this does NOT grant the right to EHR/EMR system providers to offer the tool in their systems)
  2. academic research that is NOT funded in-whole or in-part by a commercial entity
  3. clinical trials — AD8 clinical trials will require a commercial license. Please contact us and provide the following information to receive the license agreement:
    • Number of subjects in your clinical trial
    • Number of planned administrations of the AD8® per Subject


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