According to Vygotsky, a child's private speech later turns into:

1. Private speech peaks in the preschool years. 2. It decreases in the later primary years. 3. Vygotsky held that it becomes **inner speech**: silent verbal thought. **Why not the others:** It moves inward, not outward, so outer speech reverses the direction. _Source: Wikipedia, "Private speech", section "History and theory" (revision 1378894484)_