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Morphological Difficulties in People with Developmental Language Disorder.

Esther Moraleda-Sepúlveda1, Patricia López-Resa1

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Children with Developmental Language Disorder (DLD) exhibit significant challenges across all areas of morphology. These findings highlight specific grammatical morphology deficits as a key characteristic of DLD.

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Area of Science:

  • Linguistics
  • Developmental Psychology
  • Clinical Linguistics

Background:

  • Developmental Language Disorder (DLD) is characterized by linguistic features, particularly in morphology.
  • Difficulties in grammatical morphology may serve as a clinical marker for DLD.
  • Research is needed to identify specific morphological subarea distinctions in DLD.

Purpose of the Study:

  • To investigate the distinct characteristics of various morphological subareas in individuals with DLD.
  • To compare morphological performance between children with DLD and typically developing peers.

Main Methods:

  • A sample of 90 children and adolescents (ages 6-15) was assessed.
  • The sample included 47 children diagnosed with DLD and 43 in the Typical Development (TD) group.
  • The BLOC-C test's morphology scale, covering 19 subareas (including inflectional and verbal morphology), was used.

Main Results:

  • Individuals with DLD performed significantly lower than the TD group across all tested morphology subareas.
  • Lower mean scores and percentiles were observed in the DLD group compared to the TD group.
  • Consistent deficits were noted in both inflectional and verbal morphology.

Conclusions:

  • The study confirms explicit and widespread morphological difficulties in individuals with DLD.
  • The findings support exploring hypotheses related to the underlying causes of these morphological deficits.
  • Morphological assessment is crucial for identifying and understanding DLD.