 While Vygotsky never met Jean Piaget, he had read a number of his works and agreed on some of his perspectives on learning.At some point (around 1929-30), Vygotsky came to disagree with Piaget's understanding of learning and development, and held a different theoretical position from Piaget on the topic of inner speech; Piaget asserted that egocentric speech in children "dissolved away" as they matured, while Vygotsky maintained that egocentric speech became internalized, what we now call "inner speech".However, in the early 1930s he radically changed his mind on Piaget's theory and openly praised him for his discovery of the social origin of children's speech, reasoning, and moral judgements.