Refer to Erik Erikson's stages of development, how can I explain the impact that a major life cycle stage, like adolescence, has on all member of the family, including siblings, parents, grandparents, and the adolescents themselves.
When a person goes through a major life cycle stage transition, the way in which they relate to others changes. Family members often experience this change most acutely. One of the most turbulent life stage cycles is adolescence. According to German developmental psychologist Erick Erickson, adolescence is characterized by a crisis of identity. Adolescents vacillate between a strong sense of self and a deep uncertainty as to who they are. This vacillation causes adolescents to experience a high degree of anxiety. They may begin to relate to their family members from a more oppositional stance than then they were children. Rebelliousness and challenging the boundaries are part of adolescents exploration of self. During this life stage cycle, individuals need family members to affirm their value and their role in the family.