Social Role Theory posits that adulthood is characterized by the assumption of various social roles, such as worker, parent, and spouse. These roles shape an individual's behavior, attitudes, and values.

Erikson's theory proposes that adulthood is marked by the need to establish intimate relationships and to contribute to society through work and family.

Humanistic Theory, rooted in the work of Abraham Maslow and Carl Rogers, emphasizes the individual's potential for growth, self-actualization, and the pursuit of personal meaning.

Levinson's theory suggests that individuals in middle adulthood may experience a period of questioning and reevaluation of their life choices and values, often referred to as a midlife crisis.

Life Course Theory posits that adulthood is a dynamic process characterized by ongoing learning, adaptation, and transitions. Individuals navigate various life stages and experiences, shaping their development throughout adulthood.

Marcia's theory proposes that individuals progress through different stages of identity development. Identity Achievement is characterized by a clear sense of self, commitment to values and goals, and a sense of purpose.

Life Course Theory recognizes the influence of social and historical factors, such as economic conditions, cultural norms, and political events, on the experiences and development of individuals throughout adulthood.

Gould's theory suggests that individuals in adulthood (20-40 years) are primarily concerned with personal growth, self-discovery, and establishing their identity.

Social Role Theory highlights the significance of social support and relationships in shaping adult development. It posits that individuals' roles and relationships within their social networks influence their behavior, attitudes, and well-being.

Levinson's theory proposes that individuals in middle adulthood may experience a period of stagnation and a desire for change, often referred to as a midlife transition.

Humanistic Theory emphasizes the individual's capacity for personal agency and choice. It posits that individuals have the freedom and responsibility to shape their own lives and pursue their unique potential.

Erikson's theory suggests that young adulthood is characterized by the need to develop a sense of identity, including a sense of self, purpose, and direction in life.

Life Course Theory recognizes the influence of cultural and societal factors, such as norms, values, and expectations, on the experiences and development of individuals throughout adulthood.

Gould's theory suggests that individuals in middle adulthood (40-65 years) are primarily concerned with career and family responsibilities, as well as the challenges and opportunities that come with these roles.

Social Role Theory posits that social and cultural norms shape the roles and expectations that individuals assume in adulthood. These roles influence their behavior, attitudes, and values.