Dementia is a progressive loss of cognitive function, marked by memory problems, trouble communicating, impaired judgment, and confused thinking. Dementia most often occurs around age 65 and older but is a more severe form of decline than normal aging. People who develop dementia may lose the ability to regulate their emotions, especially anger , and their personalities may change.
Defining Dementia
Dementia is one of the most studied topics in modern psychology and mental health. At its core, dementia involves a specific cluster of experiences — cognitive, emotional, and physical — that have been consistently identified across cultures and research populations.
Psychologists define dementia using diagnostic criteria that have been refined over decades of clinical and empirical work. The core features include recognizable patterns that distinguish dementia from related but distinct conditions.
Who Does Dementia Affect?
Dementia affects people across all demographics, though certain factors can increase vulnerability:
- Age: Can emerge at any life stage; some forms peak in specific age groups
- Biology: Genetic predisposition plays a role for many types of dementia
- Environment: Life experiences, stress, and social factors contribute significantly
- Co-occurring conditions: Dementia often appears alongside other psychological conditions
The Spectrum of Dementia
Like most psychological phenomena, dementia exists on a spectrum. Mild experiences are part of normal human life. The concern arises when dementia is persistent, intense, and interferes with daily functioning — work, relationships, or basic self-care.
Clinicians assess severity by looking at duration (how long), frequency (how often), and impairment (how much it affects daily life).
When to Seek Help
Consider professional support if dementia:
- Persists for more than a few weeks
- Interferes with work, school, or relationships
- Causes significant distress
- Involves thoughts of self-harm
Getting Help for Dementia
Making key lifestyle changes is critical to reducing a person’s risk for developing Alzheimer’s disease, as well as maintaining good cognitive functioning as long as possible. This includes engaging in regular physical activity, which increases blood and oxygen flow in the brain. It’s also important to eat a heart-healthy diet with plenty of water, fruits, vegetables, and whole grains while limiting sugar and saturated fats. Staying socially engaged later in life can also help protect against Alzheimer’s disease and dementia; this may include developing a strong, supportive network of friends