As infants develop
A) babbling shifts from single syllable utterances to combinations of different sounds.
B) the average length of each babbled sound decreases.
C) babbling tends to become more constant in pitch.
D) they shift from babbling to cooing.

Question

Quizplus · Accepted Answer

As infants develop, their babbling shifts from single syllable utterances to combinations of different sounds. This is known as canonical babbling, which usually begins around 6-7 months of age.

Answer: B 
 The average length of each babbled sound decreases as infants develop. This is because they become more skilled at producing a wider range of sounds and become more precise in their articulation.

Answer: C 
 Babbling tends to become more constant in pitch as infants develop. This is because they become more able to control their vocal cords and produce steady, sustained sounds.

Answer: D 
 This statement is incorrect. Coos are actually an earlier stage of vocal development that typically precedes babbling. Infants usually begin cooing around 2-3 months of age, and then transition to canonical babbling a few months later.

As Infants Develop