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Reflections on language evolution ... : From minimalism to pluralism ...
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Reflections on language evolution: From minimalism to pluralism ...
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Reflections on language evolution: From minimalism to pluralism ...
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Hierarchical control as a shared neurocognitive mechanism for language and music
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An agent-based model of the origins of modern linguistic complexity – supplementary information ...
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An agent-based model of the origins of modern linguistic complexity – supplementary information ...
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Sound production learning across species: Beyond the vocal learning dichotomy
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In: TDX (Tesis Doctorals en Xarxa) (2020)
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Sound production learning across species: Beyond the vocal learning dichotomy
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Evolutionary Dynamics Do Not Motivate a Single-Mutant Theory of Human Language
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Abstract:
One of the most controversial hypotheses in cognitive science is the Chomskyan evolutionary conjecture that language arose instantaneously in humans through a single mutation. Here we analyze the evolutionary dynamics implied by this hypothesis, which has never been formalized before. The hypothesis supposes the emergence and fixation of a single mutant (capable of the syntactic operation Merge) during a narrow historical window as a result of frequency-independent selection under a huge fitness advantage in a population of an effective size no larger than ~15 000 individuals. We examine this proposal by combining diffusion analysis and extreme value theory to derive a probabilistic formulation of its dynamics. We find that although a macro-mutation is much more likely to go to fixation if it occurs, it is much more unlikely a priori than multiple mutations with smaller fitness effects. The most likely scenario is therefore one where a medium number of mutations with medium fitness effects accumulate. This precise analysis of the probability of mutations occurring and going to fixation has not been done previously in the context of the evolution of language. Our results cast doubt on any suggestion that evolutionary reasoning provides an independent rationale for a single-mutant theory of language.
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Keyword:
Adquisició del llenguatge; Evolució humana; Evolutionary genetics; Genètica evolutiva; Human evolution; Language acquisition; Origen del llenguatge; Origin of languages
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URL: http://hdl.handle.net/2445/170388
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Interpreting A-Chains at the Interface
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In: North East Linguistics Society (2020)
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Expletive Split: Existentials and Presentationals
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In: North East Linguistics Society (2020)
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Language evolution and complexity considerations: The no half-Merge fallacy
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Language evolution and complexity considerations: The no half-Merge fallacy
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The contribution of the hippocampus to language processing
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In: TDX (Tesis Doctorals en Xarxa) (2017)
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Domain-general perspectives on the neurocognitive specialization of language
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In: TDX (Tesis Doctorals en Xarxa) (2017)
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Domain-general perspectives on the neurocognitive specialization of language
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