At what stage does ego development typically begin, according to Erikson's theory?

Ego development, according to Erik Erikson's theory, begins in infancy. In this initial stage, which Erikson refers to as "Trust vs. Mistrust," infants learn to trust their caregivers and the world around them. Successful resolution of this stage fosters a strong sense of trust and security, which are essential components of ego development.

During infancy, the foundational aspects of personality and self-concept start to form as infants interact with their environment. The experiences they encounter, particularly in terms of responsive caregiving, play a critical role in shaping their future emotional and social development. The positive or negative resolution of this stage lays the groundwork for later stages of ego development, where more complex aspects of identity and personal agency are explored.

In contrast, the other stages—childhood, adolescence, and adulthood—build upon the foundations established during infancy. While development continues throughout the lifespan and each of these stages contributes to ego development, the initial stage during which this development is thought to begin occurs in infancy, making it the correct answer.