From social contingency to verbal reference: A constructivist hypothesis.

Abstract

In the first year of life, infants’ word learning is slow, laborious, and requires repeated exposure to word-referent co-occurrences. In contrast, by 14-18 months, infants learn words from just a few labeling events, use joint attention and eye-gaze to decipher word meaning, and begin to use speech to communicate about absent things. We propose that this remarkable advancement in word learning results from attaining a referential understanding of words – that words are linked to mental representations and used intentionally to communicate about real-world entities. We suggest that verbal reference is supported by co-developing conceptual, social, representational, and statistical learning capacities. We also propose that infants’ recognition of this tri-directional link between words, referents, and mental representations is enabled by their experience participating in and observing socially contingent interactions. Understanding verbal reference signals a qualitative shift in infants’ word learning. This shift enables infants to bootstrap word meanings from syntax and semantics, learn novel words and facts from non-ostensive communication, and make inferences about speakers’ epistemic competence based on their language production. In this paper, we review empirical findings across multiple facets of infant cognition and propose a novel developmental theory of verbal reference. Finally, we suggest new directions of empirical research that may provide stronger and more direct evidence for our theory and contribute to our understanding of the development of verbal reference and language-mediated learning in infancy and beyond.

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