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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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Experience is Instrumental in Tuning a Link Between Language and Cognition: Evidence from 6- to 7- Month-Old Infants' Object Categorization
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Early language experience in a Papuan community.

Marisa Casillas1, Penelope Brown1, Stephen C Levinson1

  • 1Max Planck Institute for Psycholinguistics, Netherlands.

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|September 29, 2020
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Summary

Child-directed speech varies globally. This study found that in a Papua New Guinea community, situational factors, not caregiver beliefs, primarily influenced speech rates to young children, with no developmental delays observed.

Keywords:
Papuanchild-directed speechinteractionlinguistic inputnon-WEIRDvocal maturity

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Area of Science:

  • Developmental Psychology
  • Linguistic Anthropology
  • Cross-Cultural Studies

Background:

  • Child-directed speech (CDS) rates vary, influenced by caregiver beliefs and daily life organization.
  • Previous cross-cultural CDS research faced confounds comparing diverse communities.
  • Subsistence farming communities may differ significantly from postindustrial ones in CDS patterns.

Purpose of the Study:

  • Investigate daylong language environments of young children (0;0-3;0) in a traditional Papua New Guinea community.
  • Examine the impact of caregiver beliefs versus situational factors on CDS rates.
  • Compare findings with a Tseltal Mayan community using similar methods.

Main Methods:

  • Daylong audio recordings of children's language environments on Rossel Island, Papua New Guinea.
  • Analysis of child-directed speech rates and linguistic input.
  • Ethnographic data on contingency-seeking child interaction styles.
  • Comparative analysis with a Tseltal Mayan community.

Main Results:

  • Children on Rossel Island received infrequent direct address.
  • Linguistic input rates were predominantly influenced by situational factors.
  • Children's vocalization maturity showed no developmental delay.
  • Input characteristics differed between the Rossel Island and Tseltal Mayan communities.

Conclusions:

  • Situational factors play a crucial role in shaping CDS in traditional communities.
  • Caregiver beliefs about children as conversational partners may not be the sole driver of CDS variation.
  • Findings inform models of early language acquisition and learning mechanisms.