Erik Erikson discusses the eight stages of social development across the lifespan. At each stage, there is a crisis or conflict related to a developmental task. If each stage of development is completed, a person will develop a healthy personality. The first stage extends from birth to one year of age, with the main conflict being trust versus distrust. At this stage, babies learn to trust or distrust depending on whether their needs are met or not. The second stage conflict is that of autonomy versus shame and doubt, which occurs between the ages of one and three. During this time, toddlers begin to gain independence. Erikson believed that if this behavior was encouraged, they would learn to become independent rather than experiencing feelings of shame and doubt. Imitation versus guilt is the conflict that arises during Erikson's third stage. It occurs in preschool children, ages three to six. At this time, children learn to start activities on their own. If this stage is successful, the child acquires a feeling of social responsibility and self-confidence. However, if this step is not completely completed, the child may experience feelings of guilt. Between the ages of six and twelve, children face the stage four crisis, that of industry versus inferiority. First, Freud is praised for creating psychoanalysis which is used today as a form of therapy (Huffman, 2012, p. 469). Talking about sex in the mid-1890s was very rare. So when Freud developed this theory which openly discussed sex, he became very respected. However, Freud's theory had its flaws. Huffman (2012) states, “Freud based his theories almost exclusively on subjective case histories of adult patients” (p. 469). If read, the theory also seems more focused on male development rather than both sexes. Although there are some negative points, Freud still had a significant impact on many psychological works.