The Polysemy of the Words that Children Learn over Time Bernardino Casas
[email protected] 1 Neus Català
[email protected] 2 Ramon Ferrer-i-Cancho
[email protected] 1 Antoni Hernández-Fernández
[email protected] 1,3 Jaume Baixeries
[email protected] 1 1. Complexity & Quantitative Linguistics Lab, Departament de Ciències de la Computació, Laboratory for Relational Algorithmics, Complexity and Learning (LARCA), Universitat Politècnica de Catalunya, Barcelona, Catalonia. 2. Complexity & Quantitative Linguistics Lab, Departament de Ciències de la Computació, Center for Language and Speech Technologies and Applications (TALP Research Center), Universitat Politècnica de Catalunya, Barcelona, Catalonia. 3. Institut de Ciències de l0Educació, Universitat Politècnica de Catalunya, Barcelona, Catalonia. arXiv:1611.08807v2 [cs.CL] 26 Mar 2019 1 Abstract Here we study polysemy as a potential learning bias in vocabulary learning in children. Words of low polysemy could be preferred as they reduce the disambiguation effort for the listener. However, such preference could be a side-effect of another bias: the preference of chil- dren for nouns in combination with the lower polysemy of nouns with respect to other part-of-speech categories. Our results show that mean polysemy in children increases over time in two phases, i.e. a fast growth till the 31st month followed by a slower tendency towards adult speech. In contrast, this evolution is not found in adults interacting with children. This suggests that children have a preference for non-polysemous words in their early stages of vocabulary acquisition. Interestingly, the evolutionary pat- tern described above weakens when controlling for syntactic category (noun, verb, adjective or adverb) but it does not disappear completely, suggesting that it could result from a combination of a standalone bias for low polysemy and a preference for nouns.