Final answer:
According to Vygotsky, private speech provides an internal monitor that guides the child's actions
Step-by-step explanation:
According to Lev Vygotsky's sociocultural theory of cognitive development, private speech (talking to oneself) serves as an internal tool for self-regulation. It helps children plan, guide, and monitor their actions and thoughts. As children develop, private speech transforms into inner speech, which continues to play a role in regulating one's behavior and problem-solving. While private speech can have various functions, its role as an internal monitor aligns with Vygotsky's perspective. This process aids in the internalization of knowledge and plays a crucial role in a child's Zone of Proximal Development (ZPD), the range of tasks a learner can perform with assistance.