Personality Changes Personality changes are a noticeable symptom of dementia in the elderly. Behavior changes may start suddenly, or gradually become worse. Types of personality changes include anxiety, depression, a decreased interest in daily activities, inappropriate mood or behavior, irritability, reduced emotional expression, a self-centered attitude, poor temper control and withdrawal from social interaction. Additional Symptoms Other symptoms that are associated with dementia include changes in feeling or perception, disorientation, impaired recognition, hallucinations and delusions, severe confusion and lack of concentration. Read more: Dementia Symptoms In The Elderly | LIVESTRONG.COM Last night's Circus Stunt performance leads me to believe he's either a straight up whacko of is experiencing what most people as old as he is do-- ELDERLY dementia.