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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.
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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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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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Semantics guide infants' vowel learning: Computational and experimental evidence.

S M M Ter Schure1, C M M Junge2, P P G Boersma1

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Summary

Infants learn speech sounds better when consistently paired with objects, aiding phonetic categorization beyond just sound frequency. This semantic context supports language development, especially for infants with larger future vocabularies.

Keywords:
Associative learningAuditory discriminationCategorizationComputational modelingInfant cognitionPhoneme acquisition

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Area of Science:

  • Developmental Psychology
  • Computational Linguistics
  • Auditory Perception

Background:

  • Infants initially focus on language-relevant speech sound contrasts.
  • Phonetic categorization in infants is influenced by sound frequency distributions.
  • Semantic context may complement bottom-up learning for speech sound discrimination.

Purpose of the Study:

  • To investigate if semantic context improves non-native vowel contrast discrimination in infants.
  • To determine the role of consistent object-sound pairing in phonetic categorization.
  • To computationally and experimentally assess the impact of semantic context on speech perception.

Main Methods:

  • A neural network simulation trained on sound-meaning pairs.
  • An experiment with 8-month-old infants pairing speech sounds with distinct visual objects.
  • Longitudinal assessment of infant sensitivity and vocabulary development.

Main Results:

  • Neural networks formed distinct categories only with consistent sound-object pairings.
  • 8-month-old infants showed no immediate sensitivity to pairing conditions.
  • Infant sensitivity at 8 months interacted with 18-month vocabulary size, favoring consistent pairings.

Conclusions:

  • Consistent semantic context aids infants in discriminating speech sounds, even with ambiguous auditory input.
  • This supports the role of meaning-based learning in early phonetic development.
  • Infants with larger future vocabularies benefit more from consistent semantic-phonetic training.