The document discusses several major theories of child development, including Freud's psychosexual stages, Erikson's psychosocial stages, and Piaget's stages of cognitive development. Freud believed that children progress through oral, anal, phallic, latency, and genital stages. Erikson described stages of trust vs mistrust, autonomy vs shame, initiative vs guilt, industry vs inferiority, identity vs role confusion, intimacy vs isolation, generativity vs stagnation, and integrity vs despair. Piaget's stages included sensorimotor, preoperational, concrete operational, and formal operational. The theories provide frameworks for understanding child development.