Topics in Cognitive Science 6 (1):183-195 (2014)

Marie Coppola
University of Connecticut
It is largely acknowledged that natural languages emerge not just from human brains but also from rich communities of interacting human brains (Senghas, ). Yet the precise role of such communities and such interaction in the emergence of core properties of language has largely gone uninvestigated in naturally emerging systems, leaving the few existing computational investigations of this issue at an artificial setting. Here, we take a step toward investigating the precise role of community structure in the emergence of linguistic conventions with both naturalistic empirical data and computational modeling. We first show conventionalization of lexicons in two different classes of naturally emerging signed systems: (a) protolinguistic “homesigns” invented by linguistically isolated Deaf individuals, and (b) a natural sign language emerging in a recently formed rich Deaf community. We find that the latter conventionalized faster than the former. Second, we model conventionalization as a population of interacting individuals who adjust their probability of sign use in response to other individuals' actual sign use, following an independently motivated model of language learning (Yang, , ). Simulations suggest that a richer social network, like that of natural (signed) languages, conventionalizes faster than a sparser social network, like that of homesign systems. We discuss our behavioral and computational results in light of other work on language emergence, and other work of behavior on complex networks
Keywords Sign language  Conventionalization  Language emergence  Agent‐based modeling  Homesign  Lexicon  Social networks
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DOI 10.1111/tops.12076
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Universal Grammar, Statistics or Both?Charles D. Yang - 2004 - Trends in Cognitive Sciences 8 (10):451-456.
Collective Behavior.Robert L. Goldstone & Todd M. Gureckis - 2009 - Topics in Cognitive Science 1 (3):412-438.
Evolutionary Consequences of Language Learning.Partha Niyogi & Robert C. Berwick - 1997 - Linguistics and Philosophy 20 (6):697-719.

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