Symbolic interactionism emphasizes the importance of social interaction and the maintenance of social roles in old age. It argues that older adults continue to be active and engaged members of society, and that their social interactions and roles help them to maintain a sense of identity and purpose.

Activity theory emphasizes the importance of activity and engagement in old age. It argues that older adults who remain active and engaged in social, intellectual, and physical activities are more likely to experience positive outcomes, such as better health, well-being, and life satisfaction.

Continuity theory emphasizes the importance of maintaining continuity in one's life course. It argues that older adults who are able to maintain continuity in their social roles, activities, and values are more likely to experience positive outcomes, such as better health, well-being, and life satisfaction.

Disengagement theory emphasizes the importance of disengagement from social roles and activities in old age. It argues that older adults gradually withdraw from social interaction and activities as they age, and that this disengagement is a normal and adaptive process.

Social support theory emphasizes the importance of social support and social networks in old age. It argues that older adults who have strong social support networks are more likely to experience positive outcomes, such as better health, well-being, and life satisfaction.

Cultural theory of aging emphasizes the importance of culture and society in shaping the aging experience. It argues that the way in which older adults are perceived and treated in a given society has a significant impact on their experiences and outcomes.

Intergenerational theory of aging emphasizes the importance of intergenerational relationships in old age. It argues that older adults who have strong relationships with younger generations are more likely to experience positive outcomes, such as better health, well-being, and life satisfaction.

Lifelong learning theory of aging emphasizes the importance of lifelong learning and personal growth in old age. It argues that older adults who continue to learn and grow throughout their lives are more likely to experience positive outcomes, such as better health, well-being, and life satisfaction.

Spiritual theory of aging emphasizes the importance of spirituality and religion in old age. It argues that older adults who have strong spiritual or religious beliefs are more likely to experience positive outcomes, such as better health, well-being, and life satisfaction.

Resilience theory of aging emphasizes the importance of resilience and coping in old age. It argues that older adults who are able to cope with the challenges of aging and maintain a positive outlook are more likely to experience positive outcomes, such as better health, well-being, and life satisfaction.

Self-efficacy theory of aging emphasizes the importance of self-efficacy and control in old age. It argues that older adults who have a strong sense of self-efficacy and control over their lives are more likely to experience positive outcomes, such as better health, well-being, and life satisfaction.

Positive aging theory emphasizes the importance of positive emotions and well-being in old age. It argues that older adults who have a positive outlook on life and experience positive emotions are more likely to experience positive outcomes, such as better health, well-being, and life satisfaction.

Compression of morbidity theory emphasizes the importance of compression of morbidity in old age. It argues that the period of disability and illness at the end of life is becoming shorter, and that older adults are living longer and healthier lives.

Life course theory of aging emphasizes the importance of the life course perspective in understanding aging. It argues that aging is a lifelong process that is shaped by experiences and events throughout the life course.

Interdisciplinary theory of aging emphasizes the importance of interdisciplinary approaches to understanding aging. It argues that aging is a complex phenomenon that can only be fully understood by drawing on insights from a variety of disciplines, such as sociology, psychology, economics, and biology.