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Related Concept Videos

Language01:16

Language

952
Language is a unique communication system that uses words and systematic rules to organize and transmit information. Unlike other forms of communication, which may involve postures, movements, odors, or vocalizations, language relies on symbols and grammar. This makes human communication distinct from that of other species, who also communicate but do not use language in the same way humans do.
Corballis and Suddendorf (2007) and Tomasello and Rakoczy (2003) highlight the role of language in...
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Components of Language01:24

Components of Language

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Language, whether spoken, signed, or written, consists of specific components: lexicon and grammar. The lexicon is the vocabulary of a language, comprising its words. Grammar is the set of rules used to convey meaning through the lexicon. For example, English grammar adds “-ed” to most verbs to indicate past tense. Words are formed by combining phonemes, which are the basic sound units of a language. Different languages have different sets of phonemes (e.g., “ah” vs.
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Language Development01:22

Language Development

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Children master language quickly and with relative ease, supported by both biological predisposition and reinforcement. B. F. Skinner (1957) proposed that language is learned through reinforcement, while Noam Chomsky (1965) argued that language acquisition mechanisms are biologically determined.
The critical period for language acquisition suggests that the ability to acquire language is at its peak early in life. As people age, this proficiency decreases. Language development begins very...
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Language and Cognition01:27

Language and Cognition

836
Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
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Higher Mental Functions of the Brain: Language01:10

Higher Mental Functions of the Brain: Language

3.9K
Language is a system of communication that allows the expression of thoughts, ideas, and feelings. The brain processes language in both hemispheres.
Language formation and comprehension take place in the dominant hemisphere. The dominant hemisphere is responsible for understanding the meaning of spoken, written, or sign language, as well as the ability to communicate. For most people, the left hemisphere is the dominant one. The right hemisphere, then, gives tone and emotional context to the...
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Convergent Evolution01:54

Convergent Evolution

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Evolution shapes the features of organisms over time, ensuring that they are suited for the environments in which they live. Sometimes, selection pressure leads to the rise of similar but unrelated adaptations in organisms with no recent common ancestors, a process known as convergent evolution.
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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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Following the Dynamics of Structural Variants in Experimentally Evolved Populations

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Evolutionary dynamics of language systems.

Simon J Greenhill1,2, Chieh-Hsi Wu3, Xia Hua4

  • 1ARC Centre of Excellence for the Dynamics of Language, Australian National University, Canberra, ACT 0200, Australia; simon.greenhill@anu.edu.au.

Proceedings of the National Academy of Sciences of the United States of America
|October 27, 2017
PubMed
Summary
This summary is machine-generated.

Most grammar changes faster than basic vocabulary, challenging assumptions about language evolution. However, stable core features exist in both, requiring nuanced models for deep linguistic reconstruction.

Keywords:
language dynamicslanguage evolutionlanguage phylogenieslinguisticstypology

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Area of Science:

  • Historical Linguistics
  • Computational Linguistics
  • Language Evolution

Background:

  • Understanding language subsystems' evolutionary dynamics is crucial for historical linguistics.
  • The rate of language change is a key factor, with grammar often thought to be more stable than vocabulary.
  • Reconstructing deep language relationships is limited by the assumed rapid rate of change.

Purpose of the Study:

  • To infer and compare the rates of change in lexical and grammatical data.
  • To investigate the evolutionary dynamics of different language subsystems.
  • To assess the stability of grammatical and lexical features over time.

Main Methods:

  • Utilized a Dirichlet process mixture model for rate inference.
  • Analyzed lexical and grammatical data from 81 Austronesian languages.
  • Quantified rates of change, schismogenesis, homoplasy, and contact-induced change.

Main Results:

  • On average, most grammatical features change faster than basic vocabulary items.
  • Grammatical data exhibited less schismogenesis and higher rates of homoplasy.
  • Contact-induced change was more prevalent in grammatical data, yet stable core features were identified.

Conclusions:

  • Language subsystems possess differing evolutionary dynamics.
  • Grammar generally evolves faster than basic vocabulary, contrary to some hypotheses.
  • Nuanced models are essential for deep linguistic signal extraction amidst evolutionary noise.