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Language Evolution Can Be Shaped by the Structure of the World
Author(s) -
Perfors Andrew,
Navarro Daniel J.
Publication year - 2014
Publication title -
cognitive science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.498
H-Index - 114
eISSN - 1551-6709
pISSN - 0364-0213
DOI - 10.1111/cogs.12102
Subject(s) - linguistic universal , problem of universals , computer science , point (geometry) , linguistics , iterated function , language structure , artificial intelligence , natural language processing , mathematics , theoretical linguistics , philosophy , mathematical analysis , geometry
Human languages vary in many ways but also show striking cross‐linguistic universals. Why do these universals exist? Recent theoretical results demonstrate that Bayesian learners transmitting language to each other through iterated learning will converge on a distribution of languages that depends only on their prior biases about language and the quantity of data transmitted at each point; the structure of the world being communicated about plays no role (Griffiths & Kalish, [Griffiths, T. L., 2005], [Griffiths, T. L., 2007]). We revisit these findings and show that when certain assumptions about the relationship between language and the world are abandoned, learners will converge to languages that depend on the structure of the world as well as their prior biases. These theoretical results are supported with a series of experiments showing that when human learners acquire language through iterated learning, the ultimate structure of those languages is shaped by the structure of the meanings to be communicated.