Book excerpt: Jean Piaget, although internationally acclaimed for his revolutionary ideas about human intellectual development and how children learn, has been misunderstood by many of those attempting to interpret his theories and apply them. Fortunately, this dialogue between Dr. Evans and Piaget provides the student and general reader with a clear and accurate explanation of his theories and how he arrived at them. As David Elkind writes in the Introduction, Piaget's findings "are effecting a veritable Copernican revolution in our understanding of the growth and functioning of the human mind."