AI-CONECT: A Conversational AI for Early Dementia Prevention in Socially-Isolated Older Adults

Inclusion Criteria: * Aged 75+ * Clinical diagnosis of MCI (any subtype) or, when a clinical diagnosis is unavailable, a Telephone-MoCA (T-MoCA) score of 15-17. * Identified as socially isolated, defined as meeting both of the following self-reported criteria: (a) lives alone in one's own residence, and (b) engages in conversations lasting 30 minutes or longer no more than twice per week. * GDS-15 (15-item Geriatric Depression Scale) at/below 9 (not severely depressed). * Social self-efficacy mean ≤ 8 (on the 0-10 scale) across the 6-item Social Self-Efficacy Scale at screening, indicating low confidence in social interaction. * Ability to understand the research consent form. * Ability to connect a tablet to the Internet. Exclusion Criteria: * Diagnosed with dementia such as AD, ischemic vascular dementia, normal pressure hydrocephalus, or Parkinson's disease. * Schizophrenia, or other major psychiatric disorder defined by DSM-IV criteria. * Medications: (a) Frequent use of high doses of analgesics; Use of sedative medications except for those used occasionally for sleep (≤2 per week); (b) Use of unstable dosing of Cholinesterase inhibitors (need to be stable dosing for 2 months); (c) AD disease modifying monoclonal antibody treatment e.g., aducanumab or lecanemab (completed the treatment is allowed)