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International Association for the Study of Child Language
The International Association for the Study of Child Language (IASCL) is an academic linguistic society that focuses on the research of children's language acquisition. The IASCL was founded by a group of esteemed language acquisition researchers to promote international and interdisciplinary cooperation in the study of children's language development. The International Congress for the Study of Child Language is the IASCL's biggest sponsor and publishes the Child Language Bulletin twice a year.

Founders
The ISACL was founded in the 1970's and the very first president, Walburga Von Raffler- Engel. Raffler- Engel was a well known linguistics expert who taught at Vanderbilt University. She published a great deal of articles in the realm of linguistics, language acquisition, nonverbal communication, and psycholinguistics.

Committee
The active head members of the IASCL are listen as follows:

Children's Language Milestones
Children's language acuisition can also be referred to as first language which is how people acquire their native language when they are young. This is a linguistic based study is important because language is the main form of communication. Linguist Eric H. Lenneberg conceptualized children's language development into 6 milestones so that people can monitor the development of speech and language in a child. These Stages in First Language Acquisition are: the cooing, babbling, holophrastic, two-word, telegraphic, and the near adult stage.

Cooing
The cooing stage is the first stage of vocalization and language and occurs at the completion of 12 to 20 weeks of age. Parents will notice less crying after 8 weeks and notice a squealing and gurgling sound which is known as cooing. It’s vowel-like, carries the same pitch, and is long in length length lasting at approximately 15-20 seconds. These vowel-like sounds begin to transform into more consonantal- like sounds such as as labial fricatives, spirants, and nasals. The first cooing sounds are usually velar sounds like [k] or [g] and the volees [i] and [u].

Babbling Stage
The babbling stage occurs between 6 and 10 months. Cooing has evolved into babbling which reflects one syllable utterances like “ma”, “mu”, “da”, or “di”. Children’s intonation becomes more distinct and utterances begin to signal an emphasis on their emotions. Their vocalizations begin to intertwine with their play time, for example, a child at 8 months might notice the difference between their mouth and voice when they blow bubbles and gurgle.

Holophrastic Stage
Also known as the one- word phase, this occurs at 12-18 months. Children are expected to complete single words for everyday objects, descriptive or modifying words, action words, and interactive words. The child will have a word repertoire of at least 3 words but no more than 50 and will replicate these in a high frequency.

Two-Word Stage
By this time, a child will have a vocabulary of approximately 50 words and will begin to form a syntactical two-word phrase that holds meaning. There will be a high increase in their behavior and their interest in language will grow.

Telegraphic Stage
This stage occurs when a child is about 2-3 and by the age of 3 they have developed a vocabulary of 1000 words. The telegraphic stage provides the fastest increase in vocabulary with new additions everyday and children will not babble anymore because every utterance will have a communicative intention. The child will start putting 3-word sentences together that have lexical meaning.

Near Adult Stage
This stage ocurrs at 3 years old and the language has become established, the next thing that world appear would be grammatical morphemes.



Language in the Brain
The first years of a child's life is a critical time to monitor the 6 stages of language acquisition, so that a parent knows their child is hitting these linguistic milestones. Kuniyoshi Sakai’s Language Acquisition and Brain Development Science is an informative piece that discusses the fundamentals of language acquisition and its connection to brain development. There are many phases of brain development which serve in the stages of language acquisition in those first stages of life. Sakai is not only teaching about these stages, but also focus on the final stage of language acquisition and how it is analyzed in the mature brain.