What must be true about babbling if infants who are learning sign language show evidence of manual babbling (using sign-language-based babbling), but other infants show only vocal babbling?

Question

Quizplus · Accepted Answer

The fact that infants learning sign language show evidence of manual babbling suggests that babbling is related to language acquisition in general, rather than just vocal speech. This implies that babbling is not specific to vocal motor development but rather is a broader component of overall language learning. Therefore, choice C is the best answer.

What Must Be True About Babbling If Infants Who Are