Observe the child with the adult and familiar items.
The adult may ask, “What do you want?” or hold up a ball, bottle or desired item and wait for the infant to vocalize before handing it to him.
The infant will reach toward what he wants and vocalize, often with the beginning sound of the item. Alternatively, the infant may use a sound that is not in the word, but will use the same sound each time to represent the item.
The child imitates sounds he can make most easily. The easiest sounds are vowels and the consonants made in the front of the mouth and with the lips, such as b, m, d. Attempts to make sounds associated with objects the infant is holding or looking at indicates recognition and comprehension.
North Carolina Department of Public Instruction, 2015
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