A psychologist must confront many prejudices against older adults that are manifested in most people in non-older adult cohorts. Clinical psychologists specializing in geropsychology work with individual older adults; family members of older adults, including spouses/partners, siblings, and adult children; and caregivers when treating the psychological problems experienced by older adults and dealing with issues of caregiving to older adults experiencing mental illness, dementia, and/or psychological reactions to co-occurring medical illnesses. Unfortunately, despite the fact that older adults are affected by the forces of ageism and stigma, and the fact that community psychologists strive to understand and improve social inequalities and to enable empowerment of marginalized people, there is a significant dearth of research in the field of community psychology. There are four types of ageism: personal, institutional, intentional, and unintentional. The majority of older adults have experienced age discrimination and stigmatization at some time after the age of 65.