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Related Experiment Videos

Morehead & Ingram (1973) revisited.

David Ingram1, Donald Morehead

  • 1Department of Speech and Hearing Science, Arizona State University, Tempe 85287-0102, USA. david.ingram@asu.edu

Journal of Speech, Language, and Hearing Research : JSLHR
|June 19, 2002
PubMed
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Children with language impairment show specific strengths in progressive suffix use, not all inflectional morphology. Reanalyzing original data clarifies conflicting research on language development and morphology.

Area of Science:

  • Linguistics
  • Developmental Psychology
  • Speech-Language Pathology

Background:

  • Conflicting findings exist regarding inflectional morphology skills in children with language impairment compared to typically developing peers.
  • Early research suggested an advantage for children with language impairment, but later studies reported the opposite.
  • Methodological differences in matching participants and measuring morphology may explain these discrepancies.

Purpose of the Study:

  • To reanalyze a subset of the Morehead and Ingram (1973) data.
  • To reconcile contradictory findings on inflectional morphology in children with language impairment.
  • To investigate the impact of methodological factors on research outcomes.

Main Methods:

  • Reanalysis of a subset of original data from Morehead and Ingram (1973).

Related Experiment Videos

  • Focus on inflectional morphology, including progressive suffix, plural, possessive, and verbal morphemes (third-person present tense, past tense).
  • Consideration of participant matching on Mean Length of Utterance (MLU), measurement of inflectional morphology, and subject selection criteria.

    • Main Results:

    • Children with language impairment demonstrated an advantage specifically on the progressive suffix.
    • No advantage was found for plural, possessive, or verbal morphemes (third-person present tense, past tense).
    • The reanalysis results align with more recent research findings.

    Conclusions:

    • Methodological issues, including participant matching and measurement techniques, are critical in understanding language development research.
    • The specific advantage for children with language impairment lies in the progressive suffix, not all inflectional morphology.
    • Reconciling discrepant findings emphasizes the need for careful consideration of research design in child language studies.