Children's ability to reflect upon language begins to appear about age two (Clark, 1978). During the early stages of language development, children correct their own pronunciations, question the appropriateness of speech styles, play with different linguistic units, and make judgments concerning language usage for varying situations (Clark, 1978). Children exhibit an increasing awareness of language with age and soon become aware of both the form and function of language. Their metacognitive skills become apparent as they progress from the simple to the more complex linguistic structures. Children's language acquisition and cognitive development continue to develop during the early years of school (Clark, 1978).
Brown, D. L., & Briggs, L. D. (1986). Linguistic Development of Children and the Syntax of Basals. Reading Horizons, 27 (1). Retrieved from http://scholarworks.wmich.edu/reading_horizons/vol27/iss1/4