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The 2 primary phases include Non-speech-like vocalizations and Speech-like vocalizations. Non-speech-like vocalizations include a. vegetative sounds such as burping and b. fixed vocal signals like crying or laughing. Speech-like vocalizations consist of a. quasi-vowels, b. primitive articulation, c. expansion stage and d. canonical babbling.
Developmental linguistics is the study of the development of linguistic ability in an individual, particularly the acquisition of language in childhood.It involves research into the different stages in language acquisition, language retention, and language loss in both first and second languages, in addition to the area of bilingualism.
Infants start without knowing a language, yet by 10 months, babies can distinguish speech sounds and engage in babbling. Some research has shown that the earliest learning begins in utero when the fetus starts to recognize the sounds and speech patterns of its mother's voice and differentiate them from other sounds after birth. [1]
The production of spoken language involves three major levels of processing: conceptualization, formulation, and articulation. [1] [8] [9]The first is the processes of conceptualization or conceptual preparation, in which the intention to create speech links a desired concept to the particular spoken words to be expressed.
Infants first begin vocalizing by crying, followed by cooing and then vocal play. These first forms of sound production are the easiest for children to use because they contain natural, reflexive, mostly vowel sounds. Babbling usually occurs in all children acquiring language. [4]
Language acquisition usually refers to first-language acquisition. It studies infants' acquisition of their native language, whether that is a spoken language or a sign language, [1] though it can also refer to bilingual first language acquisition (BFLA), referring to an infant's simultaneous acquisition of two native languages.
Whereas 1-month-olds only exhibit this preference if the full speech signal is played to them, 4-month-old infants prefer infant-directed speech even when just the pitch contours are played. [6] This shows that between 1 and 4 months of age, infants improve in tracking the suprasegmental information in the speech directed at them.
Studies related to vocabulary development show that children's language competence depends upon their ability to hear sounds during infancy. [4] [7] [8] Infants' perception of speech is distinct. Between six and ten months of age, infants can discriminate sounds used in the languages of the world. [4]