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Jean Piaget (1896-1980) was a renowned psychologist of the 20th century and a pioneer in developmental child psychology.He classi?ed the child's development into four sequential periods: (1) The sensorimotor period frombirth through the ?rst 18 to 24 months, (2) the pre-operations period between the ages of two and seven years old, (3) the concrete operations period between the ages seven and 11 years old, and (4) the formal operations period that begins around age 11 and continues through adolescence

Jean Piaget (1896-1980) was a renowned psychologist of the 20th century and a pioneer in developmental child psychology. Piaget did not
accept the prevailing theory that knowledge was innate or a priori. Instead, he believed a child’s knowledge and understanding of the world developed over
time, through the child’s interaction with the world, empirically. His cogitations on cognitive development in parallel with his epistemological view gave birth to
the study of genetic epistemology. Most famously, Piaget was able to perceive how children created schemas that shaped their perceptions, cognitions, and
judgment of theworld. He classied the child’s development into four sequential periods: (1) The sensorimotor period frombirth through the rst 18 to 24
months, (2) the pre-operations period between the ages of two and seven years old, (3) the concrete operations period between the ages seven and 11 years old,
and (4) the formal operations period that begins around age 11 and continues through adolescence