“…However, in individuals who can complete cognitive testing, change in cognitive functioning (particularly episodic memory) has been observed in adults with Down syndrome several years before clinical diagnosis of dementia (Crayton et al, 1998;Devenny et al, 2002;Krinsky-McHale et al, 2002). Nevertheless, changes in behavior and personality now form the basis of several caregiver-reported screening tools for dementia, particularly for individuals with Down syndrome (Oliver et al, 2011;Whitwham, McBrien, & Broom, 2011). Strydom, Chan, Fenton, et al (2013) defined mild cognitive impairment as individuals who had previously screened positive for possible dementia on the Dementia Questionnaire for People with Intellectual Disability screening tool (DMR; Evenhuis, 1992), or because of concerns about decline in functioning or memory, and explored its predictive value for dementia diagnoses two years later using ICD-10 and DSM-IV criteria.…”