Babbling and the first 50 words
Babbling and early words share a lot of characteristics
During this stage children mainly use monosyllabic utterances, use many stops, nasals and fricatives, and rarely use consonant clusters. In addition, they most frequently use the central, mid-front, and low-front vowels. Bilabial and apical productions are common.
First 50 Words
The first word is typically produced around the first birthday.
The first word is defined as "An entity of relatively stable phonetic form that is produced consistently by a child and is recognizably related to the adult-like word form of a particular language" (Bauman-Waengler, 2020).
A proto-word is a word that is used consistently by the child but is not related to the adult form of the word. Proto-words are also known as phonetically consistent forms, vocables, and quasi-words.
Example: If a child says "cu" consistently for "cup," it would be considered a word. However, if the child says "na" consistently for bottle, it is considered a proto-word because it is not related to the adult form of the word. Similarly, if a child says "cu" for everything in sight and happens to name a cup it is not considered a word because it is not consistent.
(Bauman-Waengler, 2020)