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Related Experiment Videos

Semantic comprehension in infancy: a signal detection analysis

D G Thomas, J J Campos, D W Shucard

    Child Development
    |September 1, 1981
    PubMed
    Summary

    Thirteen-month-old infants show early word comprehension by looking at objects named by their mothers. This developmental shift in infant language development was observed, unlike in 11-month-olds.

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    Area of Science:

    • Developmental Psychology
    • Cognitive Science
    • Linguistics

    Background:

    • Infant language acquisition is a complex process.
    • Assessing infant word comprehension requires controlling for confounding factors like response bias and maternal cues.
    • Previous research suggests a potential developmental shift in object word recognition around 13 months of age.

    Purpose of the Study:

    • To validate a novel paradigm for assessing infant comprehension of concrete nouns.
    • To investigate whether 11- and 13-month-old infants direct eye fixations to object referents when named.
    • To identify a developmental shift in infant responding to object words between 11 and 13 months.

    Main Methods:

    • Utilized a controlled experimental setup measuring infant eye fixation duration.

    Related Experiment Videos

  • Mothers uttered known, unknown, and nonsense words while infants viewed objects.
  • Signal detection theory analyses were applied using known words as signal and nonsense words as noise.

    • Main Results:

    • Thirteen-month-olds significantly increased looking time at the referent of "known" words compared to nonsense words.
    • No significant difference in looking time was observed for "unknown" words at either age.
    • No significant effects were found at 11 months of age or related to infant sex.

    Conclusions:

    • The study successfully validated a paradigm for assessing infant word comprehension.
    • A developmental shift in infant word recognition emerges by 13 months of age.
    • Infant eye-tracking provides a reliable method for studying early language development and comprehension.