Which of the following best describes a benefit to the language development of infants resulting from baby talk or "infant-directed speech" as indicated by the research of Dr. Laurel Trainor at McMaster University?
A)
The slowed speed at which infant-directed speech is delivered allows infants to perceive proper segmentation between the spoken words.
B)
Paired with appropriate facial expressions, infant-directed speech can help to shape the social behaviour of infants.
C)
The exaggerated changes in pitch helps infants discriminate between vowel sounds, aiding in the learning of vowel sound categories.
D)
The characteristic high-pitched voice usage is easier for infants to understand, and so they are more willing to engage in conversation.
Answer: C