What is said reflects our thoughts, but only what is puzzling, new, or challenging. We omit what we already know or understand. So also private speech decreases as our performance or understanding improves. Applications of private speech in learning include planning, monitoring progress, or guiding ourselves in working through challenging tasks and mastering new skills. It can help us manage situations and control our behavior by verbalizing our feelings, or venting to ourselves.
Private speech is a useful tool in learning.
Some of us like to talk things through with someone or in a group, either to help us understand or to remember better. This can be a learning style, and a very effective one. We use multiple senses and experiences to process and reinforce our learning, and the combination of these strategies is very individual. Whenver we encounter unfamiliar or demanding activites in our lives, private speech resurfaces. U.S. Department of Education, 4.