Erik Erikson's theory of psychosocial development proposed 8 stages that people progress through from infancy to late adulthood. The first stage, trust vs mistrust, occurs from birth to 1 year as infants develop trust or mistrust based on the dependability of their caregivers. The second stage, autonomy vs shame and doubt, takes place in early childhood as toddlers learn independence in controlling their bodily functions. The third stage, initiative vs guilt, happens in preschool years as children begin to assert themselves and direct play, developing a sense of initiative or guilt. Erikson believed that successfully completing each stage leads to healthy development.