This document summarizes key aspects of geriatric psychology. It discusses common mental health disorders seen in older adults such as depression, dementia, and loneliness. Major concerns for the elderly are also outlined, including retirement, declining health, loss of independence, and social isolation. Finally, the "triple D's" - depression, delusion, and delirium - are explained as they frequently occur in older populations due to physical and mental health issues. Geriatric psychology aims to understand and address the mental health needs of individuals as they age.