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this post was submitted on 26 Jun 2023
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The more I learn about dolphin communication, the less eager I am to call it "completely non-linguistic" instead of "proto-linguistic". They're even able to understand subject and object in SOV, I remember an experiment using signs like:
And baby talk is a type of register - the speaker is actively changing his speech because of the situation (the hearer, in this case). It's rather surprising to find it in another animal species than ours.
I suspect (and seem to recall reading) that the exaggerated pronunciations and pitch changes of baby talk may help aid children in language acquisition. For some other social animals that heavily rely on vocalizations to communicate, like dolphins, perhaps they do so for a similar reason?
This is just conjecture, but:
It's possible that it helps [proto-]language acquisition, but I feel like babytalk might also directly help the adult speaker. I'm saying that because plenty people use a babytalk-like register to address pets, that won't benefit from it.
Perhaps the usage of babytalk reduces the cognitive burden associated with changing your behaviour to a way that is suitable for the presence of children nearby?