@Dutchess_III So every single child who makes a mistake is explicitly corrected every time? I don’t believe that.
From Formal Principles of Language Acquisition (1983):
It is therefore necessary to ask if negative information is in fact available to a language learner. It is clear that parents do not simply labeled nonsentences to children in a systematic manner; no parents (or other speakers) say “Here is a sentence, and it is ungrammatical, and here is another one, and it is ungrammatical, and here is a third, which is grammatical.” Even as a first step in looking for the existence of negative information we have to turn to the concept of correction, the concept that when the child produces an ungrammatical sentence, he is somehow informed that the sentence is somehow ungrammatical. The child will have to have some abilities of preanalysis in which some kind of event is translated into the information that the sentence he has spoken is ungrammatical. If some event can result in the learner’s deciding that a sentence is ungrammatical , we can call this negative information. Of course this interpretation is consistent with the general need for preanalysis.
The question therefore becomes: Is the child corrected when he produces an ungrammatical sentence? (37) In the opinion of those who have studied the corpuses of of children’s speech, there seems to be very little of this kind of feedback. [...] Brown and Hanlon (1970) analyzed a corpus of mother-child interactions and measured the proportion of nonapproval responses of the mother to “primitive” (ungrammatical) and to well-formed expressions of the child, and found no significant difference between the two proportions; mothers did not differentially disapprove grammatical and ungrammatical sentences. Brown and Hanlon also considered the possibility that a more subtle process of correction was going on than approval or disapproval, namely, that the child was understood more readily when he uttered a grammatical sentence than when he uttered a primitive sentence. In other words, the learner would have to translate noncomprehension by the listener into into an assumption that his sentence was ungrammatical. To examine this question Brown and Hanlon measured the proportion of times that mothers produced comprehending responses to grammatical and primitive sentences and again found no significant differences. Mothers seemed to understand ungrammatical sentences about as well as grammatical ones. The investigators pointed out that, in fact, what parents correct are semantic mistakes, not syntactic ones.
This evidence is only partial, of course. For example, it might be that mothers try especially hard to understand children’s utterances, whereas other adults and children differentially understand grammatical and ungrammatical utterances. There is much room for empirical research on these questions, but Slobin (1972) claims that in the many societies the Berkeley group has studied there is no evidence that children are corrected for ungrammatical utterances. Pp.64–65.
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Notes.
37. Even if the child is corrected, there is no reason to believe that he takes note of the correction in a way useful for language acquisition. Consider the mother-child interaction reported in McNeill (1966, 69):
Child: Nobody don’t like me.
Mother: No, say “Nobody likes me.”
Child: Nobody don’t like me.
[... Eight repetitions of this dialogue…]
Mother: No, now listen carefully; say “nobody likes me.”
Child: Oh! Nobody don’t like me.