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Vocalizations are sounds produced by children before they learn to talk. For children with ASD, vocalizations may continue to be used throughout the life span, particularly if spoken language does not develop. Vocalizations can be divided into two categories: speechlike and nonspeech. Speechlike vocalizations include consonant and vowel sounds (e.g., baba, daba) and are often referred to as babbling or cooing. Nonspeech vocalizations are natural, vegetative sounds that do not resemble speech, such as crying, laughing, burbing, as well as uncommon sound productions such as high-pitched squeals and low-pitched growls. A higher frequency and longer persistence of atypical vocalizations has been found to be present in children with ASD and in infants at high risk for the syndrome, before spoken language emerges.
References and Readings
- Schoen, E., Paul, R., & Chawarska, K. (2009). Vocal development in toddlers with ASD. In R. Paul & P. Flipsen (Eds.), Child speech sound disorders: In honor of Lawrence D. Shriberg. San Diego, CA: Plural.Google Scholar