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The evolution of auditory dispersion in bidirectional constraint grammars*

Published online by Cambridge University Press:  12 November 2008

Paul Boersma  and
Silke Hamann
Paul Boersma
Affiliation:
University of Amsterdam
Silke Hamann
Affiliation:
University of Düsseldorf
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Abstract

This paper reconciles the standpoint that language users do not aim at improving their sound systems with the observation that languages seem to improve their sound systems. If learners optimise their perception by gradually ranking their cue constraints, and reuse the resulting ranking in production, they automatically introduce a prototype effect, which can be counteracted by an articulatory effect. If the two effects are of unequal size, the learner will end up with a sound system auditorily different from that of her language environment. Computer simulations of sibilant inventories show that, independently of the initial auditory sound system, a stable equilibrium is reached within a small number of generations. In this stable state, the dispersion of the sibilants of the language strikes an optimal balance between articulatory ease and auditory contrast. Crucially, these results are derived within a model without any goal-oriented elements such as dispersion constraints.

Type
Articles
Information
Phonology , Volume 25 , Issue 2 , August 2008 , pp. 217 - 270
Copyright
Copyright © 2008 Cambridge University Press

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