زندگی را می توان به دوره های مختلفی تقسیم کرد در لینک زیر می توان مطالب مفیدی را یافت.
Lifespan Development – Simple Book Publishing (maricopa.edu)

در ادامه دوره بزرگسالی اولیه آورده می شود.

The stages of adulthood examined here include: Early Adulthood (ages 22--34). Early Middle Age (ages 35--44), Late Middle Age (ages 45--64), and Late Adulthood (ages 65 and older)

Havighurst (1972) describes some of the developmental tasks of young adults. These include:

  1. Achieving autonomy: trying to establish oneself as an independent person with a life of one’s own
  2. Establishing identity: more firmly establishing likes, dislikes, preferences, and philosophies
  3. Developing emotional stability: becoming more stable emotionally which is considered a sign of maturing
  4. Establishing a career: deciding on and pursuing a career or at least an initial career direction and pursuing an education
  5. Finding intimacy: forming first close, long-term relationships
  6. Becoming part of a group or community: young adults may, for the first time, become involved with various groups in the community. They may begin voting or volunteering to be part of civic organizations (scouts, church groups, etc.). This is especially true for those who participate in organizations as parents.
  7. Establishing a residence and learning how to manage a household: learning how to budget and keep a home maintained.
  8. Becoming a parent and rearing children: learning how to manage a household with children.
  9. Making marital or relationship adjustments and learning to parent.