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Core Lexicon in Laurentian French Speakers Without Brain Injury: Development, Validation, and Reliability.

Amélie Brisebois1,2, Simona Maria Brambati3,4,5, Éva Marois2

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Summary

This study developed and validated core lexicon lists for Laurentian French speakers, showing good reliability for clinical use in assessing lexical performance in communication disorders.

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Area of Science:

  • Linguistics
  • Speech-Language Pathology
  • Psycholinguistics

Background:

  • Lexical performance in discourse is crucial for communication.
  • The core lexicon measure identifies typical words used by individuals.
  • Assessing lexical performance is vital in acquired communication disorders.

Purpose of the Study:

  • To develop core lexicon lists for Laurentian French speakers without brain injury.
  • To evaluate the psychometric properties of these core lexicon measures.
  • To establish reliability and validity for clinical and research applications.

Main Methods:

  • Elicited spoken discourse using the Western Aphasia Battery-Revised (WAB-R) and Cinderella Story Telling (CST) tasks.
  • Developed core noun and verb lists using the CLAN program (words produced by ≥50% of participants).
  • Assessed intrarater, interrater, and long-term test-retest reliability; examined construct validity via correlations with discourse measures.

Main Results:

  • Generated four core lexicon lists: 19 nouns/5 verbs (WAB-R) and 19 nouns/16 verbs (CST).
  • Demonstrated excellent intrarater and interrater reliability for most lists/variables.
  • Showed significant positive correlations between core lexicon scores and micro/macrostructural discourse measures.

Conclusions:

  • Core lexicon measures exhibit rater reliability and construct validity in Laurentian French speakers.
  • Provides the first long-term test-retest reliability data for core lexicon scoring.
  • Offers valuable insights for clinical and research applications in speech-language pathology.