Private speech is normally observed in children between the ages of two to seven, and it essentially means speaking to oneself in an audible tone, and this is mostly done using incomplete sentences and phrases. Forman points out to the research conducted by Ohta, which showed that L2 learners used a private speech in class to expand their understanding of the second language through active repetition, manipulation, monitoring, correcting and expanding their understanding of the second language.
Private speech is a very important tool in an individual’s L2 development. The more one engages in this practice, the more he is able to make correlations and retain what is learned through the different learning processes such as reading, listening, interacting with others etc. Just as talking with others over what was taught improves the learners’ field of understanding, speaking to oneself can also aid this process. Besides, it helps one to remember the ideas given during an L2 session. Ohta concluded that students are always active in using private speech during class activities and if the teacher fronts such activities, it offers the students an opportunity to practice their language use through private speech. Hence, they may improve their fluency and understanding of the second language.