Psychosocial Stages of Development- Infancy and Toddlerhood There are two stages of psychosocial stages of development that occur in Infancy and Toddlerhood. In this discussion I will be discussing them and the elements in each. In Infancy the two stages of psychosocial development are trust vs. mistrust, these two stages are very important for the mental development of a child. This stage lasts from birth to two years old. During this stage an infant learns the stages of trusting their caregiver to take care of their needs.According to Erik Erikson, this stage in an infant’s development is a direct correlation to the levels of trust they will have as adults (Newman & Newman, 2102). For example, as an infant cries for their caregiver to meet basic needs such as feeding, diaper changes, or if the infant simply needs love and attention they are learning to develops a sense of trust in their caregiver and how quickly, or if all, their needs are being met.As a toddler, children are taught right from wrong and learn to trust their own perceptions.