The National Task Group on Intellectual Disabilities and Dementia Practices (NTG) developed a screening tool called the NTG - Early Detection Screen for Dementia (NTG-EDSD). The NTG-EDSD questionnaire
was created for family members, caregivers, and agencies to use "for the early detection screening of those adults with an intellectual disability who are suspected of or may be showing early signs of mild cognitive impairment or dementia."
Additional information and links to download the screening tool in several languages can be found on the NTG-EDSD page
of the NTG website.
NTG-EDSD questionnaire

Our Resource Library has additional articles and webinars about Alzheimer’s disease in people with Down syndrome in the Alzheimer's Disease and Dementia section.