Erik Erikson's psychosocial development theory proposed that throughout our lives, we encounter certain crises that contribute to our psychosocial development. He presented these crises as 8 stages of psychosocial conflicts, often known as the 8 Erikson stages.| The Psychology Notes Headquarters
Lev Vygotsky, a Russian psychologist, developed a theory of cognitive development in children known as the Vygotsky’s Sociocultural Theory of Cognitive Development in the early twentieth century.| The Psychology Notes Headquarters