Which is true about Jean-Jacques Rousseau? January 1, 2023 by admin He was a psychology student of psychologist Jean Piaget. He was an 18S1U1P1thS1S1P0 century philosopher of the Enlightenment. He is the father of constructivism. He is a 20S1U1P1thS1S1P0 century psychologist/educator of experiential education. See Answer He was an 18S1U1P1thS1S1P0 century philosopher of the Enlightenment.