Continuity Theory proposes that individuals' core personality traits and values remain largely consistent across the lifespan, with only minor changes occurring as a result of life experiences.

Life Course Theory emphasizes the influence of social and historical factors on individuals' lives, suggesting that their experiences and opportunities are shaped by the time and place in which they live.

Generational Theory posits that individuals' attitudes and values are primarily influenced by the generation they belong to, with shared experiences and cultural influences shaping their outlook on life.

Disengagement Theory proposes that as individuals age, they gradually withdraw from social activities and interactions, both voluntarily and involuntarily, due to physical, psychological, and social factors.

Activity Theory emphasizes the importance of remaining active and engaged in meaningful activities throughout the aging process, as this contributes to older adults' physical, mental, and social well-being.

Personal Construct Theory proposes that individuals' personalities and behaviors are shaped by their unique life experiences and the ways in which they interpret and make sense of the world around them.

Symbolic Interactionism emphasizes the role of social interactions in shaping individuals' self-concept and identity, suggesting that older adults' experiences and interactions with others influence their perceptions of themselves and their place in society.

Generativity Theory proposes that older adults experience a sense of generativity, or the desire to contribute to future generations, through activities such as mentoring, volunteering, and passing on knowledge and skills.

Socioemotional Selectivity Theory suggests that as individuals age, they become more selective in their social interactions, focusing on close relationships and activities that provide emotional meaning and support.

Social Support Theory emphasizes the importance of social support and networks in successful aging, suggesting that older adults who have strong social connections and support systems experience better physical, mental, and emotional well-being.

The Theory of Successful Aging proposes that older adults can achieve successful aging by maintaining physical, mental, and social well-being through healthy behaviors, social engagement, and cognitive stimulation.

Cognitive Decline Theory suggests that older adults experience a decline in cognitive abilities, such as memory, reasoning, and problem-solving, as a result of biological and neurological changes associated with aging.

Resilience Theory suggests that older adults who have faced adversity in their lives are better equipped to cope with challenges in later life due to their developed coping mechanisms and resilience strategies.

Cultural Context Theory emphasizes the importance of cultural and societal factors in shaping individuals' aging experiences, suggesting that cultural norms, values, and beliefs influence how individuals perceive and respond to aging.

The Theory of Mindful Aging proposes that older adults can achieve mindful aging by living in the present moment, accepting change, and engaging in activities that promote mindfulness and well-being.