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Related Concept Videos

Language Development01:22

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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.
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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.
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The sign test is an important tool in nonparametric statistics, offering a straightforward yet effective method for analyzing matched pairs, nominal data, or hypotheses concerning the median of a population. It transforms data points into positive or negative signs, avoiding the need for assumptions about data distribution and instead focusing on the direction of change. It is particularly valuable when data does not conform to the normal distribution requirements of many parametric tests. For...
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Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
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How the hand has shaped sign languages.

Michele Miozzo1, Francesca Peressotti2,3

  • 1Psychology Department, Columbia University, 1190 Amsterdam Av., New York, NY, 10027, USA. mmiozzo@barnard.edu.

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Biological constraints shape sign language handshapes for universal efficiency, while linguistic diversity influences their cross-linguistic variations. This study reveals signing-specific adaptations in hand configurations.

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Area of Science:

  • Linguistics
  • Anthropology
  • Biomechanics

Background:

  • Natural languages face competing pressures: biological constraints favoring homogeneity and cultural/historical factors promoting diversification.
  • Sign languages utilize handshapes, which are influenced by both biological and linguistic factors.

Purpose of the Study:

  • To investigate the impact of opposing forces (biological constraints vs. linguistic diversification) on handshapes in natural sign languages.
  • To determine if handshape adaptations are universal or specific to sign language use.

Main Methods:

  • Analysis of over 38,000 handshapes from 33 diverse sign languages.
  • Comparison of handshape adaptations in natural sign language use versus fingerspelling.

Main Results:

  • Handshapes in natural sign languages consistently adapt to biological constraints, similar to evolved hand functions like grasping.
  • This adaptation was not observed in fingerspelling, indicating a signing-specific phenomenon.
  • Cross-linguistic variation in handshapes is driven by linguistic, cultural, and historical processes, altering the frequency of biologically constrained forms.

Conclusions:

  • Sign language handshapes demonstrate a unique adaptation to biological constraints specific to the act of signing.
  • Linguistic and cultural factors drive handshape variability across sign languages without necessarily violating biological demands.