Who thought egocentric speech simply dissolved away as children matured?

1. Piaget and Vygotsky disagreed about egocentric speech. 2. Piaget treated it as a sign of immaturity. 3. He thought it dissolved away as children matured. 4. Vygotsky showed that it became inner speech instead. 5. Chomsky and Halliday did not propose this view. 6. So the view that it dissolved away is Piaget's. **Why the other options fail:** - Vygotsky held that it became inner speech. - Chomsky wrote about innate grammar, not egocentric speech. - Halliday studied the functions of language for children. _Source: Wikipedia, "Lev Vygotsky", section "Major themes of research" (revision 1377698493)_