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Related Experiment Video

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Following the Dynamics of Structural Variants in Experimentally Evolved Populations

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Published on: February 3, 2023

Adapting to Individual Differences: An Experimental Study of Language Evolution in Heterogeneous Populations.

Mathilde Josserand^1,2, François Pellegrino¹, Oxana Grosseck^3,4

¹Laboratoire Dynamique du Langage, Université Lyon 2/CNRS UMR 5596.

Cognitive Science

|November 6, 2024

Summary

Individual differences in language abilities significantly alter language evolution. Groups with unique language users adapt by innovating more, though with less overall communication success.

Keywords:

Individual differences Language change Language evolution Linguistic alignment Micro‐societies Variability

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Area of Science:

Linguistics
Evolutionary Biology
Cognitive Science

Background:

Individual differences in language abilities are common but often overlooked in language evolution research.
These variations can significantly influence the trajectory of language change and development.
Previous studies have not fully explored how heterogeneous linguistic groups evolve.

Purpose of the Study:

To investigate how artificial languages evolve in small groups with varying language abilities.
To determine if languages adapt to accommodate individuals with unique communication styles or impairments.
To understand the impact of individual differences on linguistic innovation and convergence.

Main Methods:

Utilized a laboratory-based group communication game with artificial languages.
Introduced heterogeneity by assigning one participant a limited letter inventory, simulating a speech impairment.
Analyzed language evolution dynamics in these micro-societies.

Main Results:

Language evolved differently in heterogeneous groups, showing increased innovation but decreased communicative success and convergence.
Observed significant partner-specific accommodation towards the individual with distinct language abilities, which influenced the group.
Group-wide adaptation varied based on participants' adherence to established linguistic norms.

Conclusions:

Individual differences are crucial drivers of language evolution, permeating and accumulating within linguistic communities.
Language adaptation in heterogeneous groups prioritizes accommodating unique characteristics, potentially at the expense of efficiency.
Future research on language evolution must integrate the role of individual variation.