Research and Funding

Instruments to Detect Cognitive Impairment in Older Adults

Ascertain Dementia 8 (including Chinese & Korean versions)

Administration Method: 
Verbal question and response to the caretaker (4); paper or via phone (217)
Administration Time: 
3 min (207) ; less than 3 min (208, 214, 217, 221)
Level of Expertise to Administer: 
Clinician (214, 215, 217, 221); Neurologist, Clinician (203 Chinese version); Neurologist (207 Korean Version)
Washington University grants permission to use and reproduce the AD8 exactly as it appears in the PDF without modification or editing of any kind solely for use in investigating dementia in clinical care or research in clinical care or research ( Free to clinicians and academics.
Measures Change Over Time: 
Target Age Range: 
65-69, 75-79, 85-89 (201); 61.31 (SD 4.4 yrs) (208); Participants: 78.6 (SD 8.9 yrs); Informants: 66.4 (SD 12.9 yrs) (214); Patients with no dementia:65.5 (SD 12.3 yrs); Patients with uncertain dementia: 68.8 (SD 13.2 yrs); Patients with dementia: 75.1 (SD 10.4 yrs) (215); Mean age: 73.3 (SD 11.3 yrs) (217); Mean age: 78.1 (SD 9.2 yrs) (221); CDR 0- 72.5 ± 5.7 yrs; CDR 0.5- 75.1 ± 8.4 yrs; CDR 1- 75.4 ± 9.6 yrs (203 Chinese Version); CDR 0= 65.53 (SD 7.83); CDR 0.5= 70.11 (SD 7.38); CDR 1= 71.63 (SD 8.03); CDR 2= 77.80 (SD 7.26) (207 Korean version)
Education Level Required to Understand Test: 
Special Population Samples: 
Suggested for Medicare Annual Wellness Visit: 


Reference Number Title Citation PMID DOI
4 Four sensitive screening tools to detect cognitive dysfunction in geriatric emergency department patients: brief Alzheimer's Screen, Short Blessed Test, Ottawa 3DY, and the caregiver-completed AD8. Carpenter CR, Bassett ER, Fischer GM, Shirshekan J, Galvin JE, Morris JC Acad Emerg Med. 2011 Apr;18(4):374-84. 21496140 10.1111/j.1553-2712.2011.01040.x
217 Validity and reliability of the AD8 informant interview in dementia. Galvin JE, Roe CM, Xiong C, Morris JC Neurology. 2006 Dec 12;67(11):1942-8. 17159098 10.1212/01.wnl.0000247042.15547.eb
207 Validity and reliability of the Korean version of the AD8 informant interview (K-AD8) in dementia. Ryu HJ, Kim HJ, Han SH Alzheimer Dis Assoc Disord. 2009 Oct-Dec;23(4):371-6. 19561437 10.1097/wad.0b013e31819e6881
203 Application of AD8 questionnaire to screen very mild dementia in Taiwanese. Yang YH, Galvin JE, Morris JC, Lai CL, Chou MC, Liu CK Am J Alzheimers Dis Other Demen. 2011 Mar;26(2):134-8. 21415088 10.1177/1533317510397330
208 Informant-based dementia screening in a population-based sample of African Americans. Malmstrom TK, Miller DK, Coats MA, Jackson P, Miller JP, Morris JC Alzheimer Dis Assoc Disord. 2009 Apr-Jun;23(2):117-23. 19484913 10.1097/wad.0b013e318190a709
201 The impact of dementia prevalence on the utility of the AD8. Christensen KJ Brain. 2011 Jun 8. 21653541 10.1093/brain/awr135
214 Patient's rating of cognitive ability: using the AD8, a brief informant interview, as a self-rating tool to detect dementia. Galvin JE, Roe CM, Coats MA, Morris JC Arch Neurol. 2007 May;64(5):725-30. 17502472 10.1001/archneur.64.5.725
215 Evaluation of cognitive impairment in older adults: combining brief informant and performance measures. Galvin JE, Roe CM, Morris JC Arch Neurol. 2007 May;64(5):718-24. 17502471 10.1001/archneur.64.5.718
221 The AD8: a brief informant interview to detect dementia. Galvin JE, Roe CM, Powlishta KK, Coats MA, Muich SJ, Grant E, Miller JP, Storandt M, Morris JC Neurology. 2005 Aug 23;65(4):559-64. 16116116 10.1212/01.wnl.0000172958.95282.2a