Final answer:
During adolescence, critical psychosocial changes include the development of personal identity and increased peer influence, key components of Erikson's identity versus role confusion stage.
Step-by-step explanation:
During adolescence, adolescents undergo significant psychosocial changes, including the development of a stronger sense of personal identity, which involves questioning "Who am I?" and "Who do I want to be?" This is a part of their psychosocial development, where according to Erikson's theory, the central task is to resolve the crisis of identity versus role confusion. As adolescents work towards building their identity, they become more responsive to close friends and their peer group, which becomes crucial for their sense of self and social development. This involves developing a personal system of moral and ethical values, becoming emotionally separated from parents, and potentially beginning to engage in romantic relationships.