The most influential developmental psychologist of the 20ᵗʰ century was
A) Lev Vygotsky.
B) Sigmund Freud.
C) Paul Baltes.
D) Jean Piaget.

Question

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Jean Piaget revolutionized the field of developmental psychology with his theory of cognitive development. His extensive research on children's cognitive abilities and stages of development has had a profound impact on our understanding of how children learn and grow. Piaget's work has also influenced many other areas of psychology, including educational psychology and cognitive neuroscience.

The Most Influential Developmental Psychologist of the 20ᵗʰ Century Was