Step 1: Understanding the Question:
The question requires identifying the psychologist who coined the educational psychology concept known as the "Zone of Proximal Development" (ZPD).
Step 2: Detailed Explanation:
Let's briefly look at the primary contributions of the listed psychologists:
Jean Piaget: Known for his theory of cognitive development, involving distinct stages (sensorimotor, preoperational, concrete, formal).
Sigmund Freud: The founder of psychoanalysis, focusing on the unconscious mind and psychosexual stages of development.
Erik Erikson: Known for his theory of psychosocial development (e.g., trust vs. mistrust, identity vs. role confusion).
Lev Vygotsky: A Soviet psychologist who developed the Sociocultural Theory of cognitive development. He introduced the Zone of Proximal Development (ZPD), which he defined as the distance between the actual developmental level (independent problem solving) and the level of potential development (problem-solving under adult guidance or with capable peers).
Vygotsky's theory heavily emphasizes that learning is a social process, deeply tied to the ZPD and the concept of instructional scaffolding.
Step 3: Final Answer:
Lev Vygotsky is the psychologist who emphasized the Zone of Proximal Development.