The eight stages of psychosocial development proposed by Erikson are as follows:
1. Infancy (0-1 years): Trust vs. Mistrust. The infant learns to trust or mistrust the world based on the interactions with their primary caregiver.
2. Early childhood (1-3 years): Autonomy vs. Shame and Doubt. The toddler learns to be independent or feel shame and doubt about their abilities.
3. Preschool (3-5 years): Initiative vs. Guilt. The preschooler learns to take initiative or feel guilty about their actions.
4. School age (6-12 years): Industry vs. Inferiority. The school-aged child learns to feel competent and productive or inferior to others.
5. Adolescence (12-18 years): Identity vs. Role Confusion. The adolescent develops a sense of self or experiences role confusion.
6. Young adulthood (19-39 years): Intimacy vs. Isolation. The young adult develops intimate relationships or feels isolated.
7. Adulthood (40-64 years): Generativity vs. Stagnation. The adult contributes to society or feels stagnant and unproductive.
8. Late adulthood (65+ years): Integrity vs. Despair. The older adult reflects on their life and feels a sense of integrity or despair.
According to Erikson, successful resolution of each stage leads to a healthy sense of self and the ability to cope with challenges. Failures to resolve a stage can result in psychological difficulties in later life.
Erikson's theory of psychosocial development has had a significant influence on psychology and has been used to understand a wide range of human behavior and development.