Who was the psychoanalyst who created a developmental theory which encompasses the entire
life span? Erik Erikson
The statement "the ego is dependent on the id, " would most likely be the work of which
psychoanalyst? Sigmund Freud
The Id Also called the pleasure principle and houses the animalistic instincts.
The ego Which is known as the reality principle, is pressured by the id to succumb to
pleasure or gratification regardless of consequences.
The four stages of Jean Piaget's theory sensorimotor, preoperations, concrete operations,
formal operations (correct order)
Jean Piaget development theory was criticized by other behavioral scientist because? his
findings were often derived from observing his own children.