Final answer:
Erikson's theory suggests that adolescence is a phase where the established sense of identity is challenged by physical and intellectual changes, which can lead to a stronger self-identity or role confusion.
Step-by-step explanation:
Erikson claimed that before adolescence, the child establishes a sense of identity but that is challenged by physical and intellectual changes of adolescence. In this developmental stage, typically occurring between ages 12-18, adolescents grapple with forming their identity, exploring the vexing questions, "Who am I?" and "What do I want to do with my life?" As they go through various physical, cognitive, and psychosocial changes, they experiment with different selves to determine which aligns with their true nature. Those who navigate this successfully solidify a robust sense of self. Conversely, those adolescents who either passively avoid this search or succumb to external pressures, such as their parents' expectations, may face a weak sense of identity and role confusion, leaving them uncertain about who they are and their future path.