Core-Lexicon and Main-Concept Production During Picture-Sequence Description in Adults Without Brain Damage and Adults With Aphasia Purpose We sought to identify the core lexicon of a picture-description task using transcripts from the AphasiaBank database and to determine differences in core-lexicon usage between control speakers and persons with aphasia (PWAs). We also investigated the relationship between core lexicon and an established discourse measure, main-concept analysis. ... Supplement Article
Supplement Article  |   November 01, 2015
Core-Lexicon and Main-Concept Production During Picture-Sequence Description in Adults Without Brain Damage and Adults With Aphasia
 
Author Affiliations & Notes
  • Sarah Grace Dalton
    University of South Carolina
  • Jessica D. Richardson
    University of South Carolina
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication. ×
  • Correspondence to Sarah Grace Dalton, who is now at the University of New Mexico: hudspeth@unm.edu
  • Jessica D. Richardson is now at the University of New Mexico.
    Jessica D. Richardson is now at the University of New Mexico.×
  • Editor: Anastasia Raymer
    Editor: Anastasia Raymer×
  • Associate Editor: Melissa Duff
    Associate Editor: Melissa Duff×
Article Information
Language Disorders / Aphasia / Attention, Memory & Executive Functions / Traumatic Brain Injury / Supplement: Select Papers From the 44th Clinical Aphasiology Conference
Supplement Article   |   November 01, 2015
Core-Lexicon and Main-Concept Production During Picture-Sequence Description in Adults Without Brain Damage and Adults With Aphasia
American Journal of Speech-Language Pathology, November 2015, Vol. 24, S923-S938. doi:10.1044/2015_AJSLP-14-0161
History: Received September 16, 2014 , Revised January 26, 2015 , Accepted May 18, 2015
 
American Journal of Speech-Language Pathology, November 2015, Vol. 24, S923-S938. doi:10.1044/2015_AJSLP-14-0161
History: Received September 16, 2014; Revised January 26, 2015; Accepted May 18, 2015

Purpose We sought to identify the core lexicon of a picture-description task using transcripts from the AphasiaBank database and to determine differences in core-lexicon usage between control speakers and persons with aphasia (PWAs). We also investigated the relationship between core lexicon and an established discourse measure, main-concept analysis.

Method A core lexicon was developed by identifying lemmas produced by 92 control speakers. Transcripts were scored—165 control transcripts and 238 PWA transcripts—using the core lexicon and a recently developed main-concept list. Median tests examined differences between controls, PWAs, and aphasia subtypes. Spearman's correlations assessed the relationship between core-lexicon and main-concept performance.

Results A 24-item core lexicon was identified. Significant differences were found between control speakers and PWAs, and between aphasia subtypes, for core-lexicon and main-concept scores. Core-lexicon and main-concept performance was significantly and positively correlated for all groups.

Conclusions We report the development of a core lexicon, differences in core-lexicon usage between speakers, and the relationship between core-lexicon and main-concept scores. Research is needed to determine the clinical utility and psychometric properties of these discourse measures and their potential contribution to multilevel discourse analysis of functional communication.

Acknowledgments
We thank the Chapman Foundation for financial support and the AphasiaBank developers and contributors.
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