Final answer:
It is true that ethnic identity development often begins in adolescence, but ethnic identity achievement usually occurs in young adulthood when individuals have a more defined sense of self and a greater understanding of their place in society.
Step-by-step explanation:
The statement, 'although ethnic identity development often starts in adolescence, ethnic identity achievement usually does not occur until young adulthood' is true.
During adolescence, individuals begin to explore various aspects of their identity, including ethnic identity. However, it is often in young adulthood that they achieve a more fully developed sense of self, having had more experiences and gained a greater understanding of their place in the world. This is supported by Erikson's theory of psychosocial development, which states that the primary task in adolescence is developing a sense of self, while young adulthood is focused on forming intimate relationships based on one's well-established identity.
In the context of ethnic minority groups, the process of racial socialization by caregivers helps adolescents to understand and value their ethnic heritage. However, it is typically in young adulthood that these teachings are fully internalized and expressed as a cohesive part of their identity.