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Area of Science:

  • Developmental Psychology
  • Cognitive Science
  • Linguistics

Background:

  • Understanding speaker intentions is crucial for effective communication.
  • The development of theory of mind, including tracking others' beliefs, is debated in preschoolers.
  • The relationship between belief tracking in communicative versus non-communicative contexts is unclear.

Purpose of the Study:

  • To investigate young children's ability to learn words from a speaker holding a false belief.
  • To compare children's belief-tracking in word-learning contexts with traditional false belief tasks.
  • To provide evidence on the development of mind-reading abilities during language acquisition.

Main Methods:

  • Children aged three to five participated in a word-learning task where the speaker had a false belief.
  • Children's performance in the word-learning task was assessed.
  • Children also completed a standard false belief attribution task.

Main Results:

  • The ability to track a speaker's epistemic state during word learning develops between three and five years of age.
  • False belief understanding in word-learning contexts mirrors performance in standard belief-attribution tasks when tasks are equated.
  • Data suggest a developmental trajectory for mind-reading during language acquisition.

Conclusions:

  • Preschoolers' ability to infer speaker's beliefs is integral to successful word learning.
  • Belief-tracking abilities in communicative and non-communicative contexts develop in tandem.
  • This study supports the notion that theory of mind abilities mature alongside language development.