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

Inclusion Criteria: * Aged 75+ * Clinical diagnosis of MCI, or MMSE ≥ 24 or MoCA ≥ 18 (i.e., early MCI) * Identified as socially isolated by at least one of the two criteria: (1)score ≤ 12 on the 6-item Lubben Social Network Scale (LSNS-6); (2) engages in conversations lasting 30 minutes or longer, no more than twice per week, per subject self-report * 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: Frequent use of high doses of analgesics; Use of sedative medications except for those used occasionally for sleep (≤2 per week); Use of unstable dosing of Cholinesterase inhibitors (need to be stable dosing for 2 months).