Piaget's Theory of Cognitive Development: This theory focuses on how children's thinking processes and abilities change as they mature. For example, Piaget believed that children go through different stages of cognitive development, such as the sensorimotor stage and the concrete operational stage.
Erikson's Psychosocial Theory: Erikson proposed that individuals experience eight psychosocial stages throughout their lives. Each stage presents a unique challenge or conflict that must be resolved for healthy development. For instance, during the early childhood stage (ages 3-6), children face the conflict between initiative and guilt.
Vygotsky's Sociocultural Theory: Vygotsky emphasized the role of social interaction in shaping cognitive development. He argued that learning takes place within the context of social relationships and cultural norms. One important concept in this theory is the zone of proximal development (ZPD), which refers to the difference between what a learner can do independently versus with guidance from others.