A major function of speech is the communication of intentions. In everyday conversation between adults, intentions are conveyed through multiple channels, including the syntax and semantics of the language, but also through nonverbal vocal cues such as pitch, loudness, and rate of speech.
The same thing occurs when we talk to infants. Regardless of the language we speak, most adults, for example, raise their voices to elicit the infant’s attention and talk at a much slower rate to communicate effectively. In the scientific community, this baby talk is termed “infant-directed speech.” There are direct relationships between the way we speak and what we wish to convey. For example, when we see a child reaching for the electrical socket, we do not call out their name as we would during a game of hide-and-go-seek.
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