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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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Related Experiment Video

Updated: Jan 13, 2026

Defining the Role Of Language in Infants' Object Categorization with Eye-tracking Paradigms
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Infants Do Not Reliably Track When Bilingual Speakers Switch Languages.

Christine E Potter1,2, Casey Lew-Williams2

  • 1Department of Psychology, University of Texas at El Paso, El Paso, TX 79968, USA.

Behavioral Sciences (Basel, Switzerland)
|October 29, 2025
PubMed
Summary
This summary is machine-generated.

Bilingual infants may not reliably use different speakers to distinguish languages. Studies show infants did not detect when speakers switched languages, suggesting speaker cues are not a primary learning tool.

Keywords:
bilingualisminfant looking timelanguage switching

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Area of Science:

  • Developmental Psychology
  • Linguistics
  • Cognitive Science

Background:

  • Bilingual infants are thought to benefit from distinct speakers for each language.
  • This aids in language separation and acquisition.
  • However, empirical evidence on infants' attention to speaker-language associations is limited.

Purpose of the Study:

  • To investigate whether monolingual and bilingual infants can learn speaker-language pairings.
  • To determine if infants attend to speaker-specific language use as a cue for language differentiation.

Main Methods:

  • Four experiments utilized looking time measures with infants.
  • Infants were familiarized with two speakers, each using a different language.
  • Habituation followed by a language-switching paradigm assessed infant attention to speaker changes.

Main Results:

  • Infants did not demonstrate reliable detection of language changes by individual speakers.
  • No consistent evidence supported infants learning speaker-language associations.
  • Looking time measures indicated a lack of response to switched languages by familiar speakers.

Conclusions:

  • Speaker-language associations may not be a salient or reliable cue for infants learning multiple languages.
  • Infants' language separation strategies might rely on different or additional cues.
  • Further research is needed to understand infant bilingual language acquisition mechanisms.