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Acquisition of Sign Languages.

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Deaf children acquire natural sign languages at the same pace as spoken languages when exposed from birth. Early sign language input is crucial for language development and academic success, preventing language deprivation.

Keywords:
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Area of Science:

  • Linguistics
  • Developmental Psychology
  • Deaf Studies

Background:

  • Natural sign languages are acquired similarly to spoken languages when accessible from birth.
  • Infants demonstrate sensitivity to visual linguistic input, showing parallels in early language milestones.
  • The visual-gestural modality influences sign phonology, iconicity, and spatial language use.

Purpose of the Study:

  • To examine the acquisition timeline of natural sign languages in deaf children.
  • To investigate the impact of early linguistic input modality on language development.
  • To highlight the consequences of language deprivation and the benefits of early sign language exposure.

Main Methods:

  • Comparative analysis of language acquisition milestones in deaf and hearing children.
  • Review of studies on visual language input and its effects on cognitive and linguistic development.
  • Examination of outcomes related to early versus delayed sign language acquisition.

Main Results:

  • Deaf children acquiring sign language from birth show comparable acquisition rates to hearing children with spoken language.
  • Delayed access to sign language results in language deprivation, negatively impacting language and academic outcomes.
  • Earlier sign language exposure correlates with improved language proficiency and academic achievement.

Conclusions:

  • Accessible, fluent sign language input from birth is critical for typical language acquisition in deaf children.
  • Early intervention and sign language exposure are essential to mitigate the negative effects of language deprivation.
  • Further research with diverse participants is needed to fully understand sign language acquisition.