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Related Concept Videos

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Environmental contributions to preschoolers' semantic fluency.

Gitit Kavé1, Moran Shalmon, Ariel Knafo

  • 1Department of Education and Psychology, The Open University, Raanana, Israel.

Developmental Science
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Summary

Environmental factors significantly impact semantic fluency in 5-year-old twins, with no genetic influence detected. Shared and non-shared environments play crucial roles in language development.

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Area of Science:

  • Developmental Psychology
  • Behavioral Genetics
  • Linguistics

Background:

  • Semantic fluency, the ability to generate words from a category, is a key indicator of language development.
  • Twin studies are valuable for disentangling genetic and environmental influences on cognitive abilities.
  • Previous research has explored genetic contributions to language skills, but environmental impacts require further investigation.

Purpose of the Study:

  • To investigate the genetic and environmental contributions to semantic fluency in 5-year-old twins.
  • To examine the influence of shared and non-shared environmental factors on semantic fluency.
  • To explore the impact of speech-related problems and demographic factors on semantic fluency performance.

Main Methods:

  • A cohort of 396 Hebrew-speaking 5-year-old twins (198 pairs) was assessed for semantic fluency.
  • Mother-reported speech-related problems were noted in 22% of the participants.
  • Statistical analyses, including twin modeling and multivariate regression, were employed.

Main Results:

  • No significant genetic effects were found for semantic fluency scores.
  • Shared environmental effects accounted for 39% and non-shared environmental effects for 61% of the variance.
  • Parental education and length of daycare attendance were significant predictors of fluency scores; speech problems in one twin affected the co-twin's score.

Conclusions:

  • Semantic fluency at age 5 is predominantly influenced by environmental factors.
  • Shared and non-shared environments play substantial roles, highlighting the importance of early life experiences.
  • Genetic influences on semantic fluency may become more apparent in later developmental stages.