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Studying language change using price equation and Pólya-urn dynamics
Tao Gong1, Lan Shuai, Mónica Tamariz
1Department of Linguistics, University of Hong Kong, Hong Kong. gtojty@gmail.com
Plos One
|March 20, 2012
Summary
Variant prestige drives language change by influencing diffusion, while other factors like transmission error and social structure only modulate change when prestige is involved. This study reveals key evolutionary dynamics in socio-cultural evolution.
Area of Science:
- Evolutionary biology
- Sociolinguistics
- Computational modeling
Background:
- Language change occurs through the spread of linguistic variants within populations.
- Understanding the selective pressures on language change is crucial for evolutionary dynamics of socio-cultural factors.
Purpose of the Study:
- To identify selective pressures in language change using the Price equation and Pólya-urn dynamics.
- To analyze the roles of variant prestige, transmission error, individual factors, and social structure in language evolution.
Main Methods:
- Utilized the Price equation to analyze simulation results from a computer model.
- Employed Pólya-urn dynamics to simulate the diffusion of linguistic variants.
- Theoretically analyzed factors influencing language change.
Main Results:
- Variant prestige was identified as the sole selective pressure driving language change.
- Transmission error, individual influence, preference, and social structure modulate diffusion only when variant prestige is present.
Conclusions:
- Variant prestige is the primary driver of language change.
- Linguistic, individual learning, and socio-cultural factors play distinct roles in language evolution.
- Provides insights for empirical studies on language change dynamics.
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