The Time-Course of Lexical Activation During Sentence Comprehension in People With Aphasia
Ferrill, Michelle and Love, Tracy and Walenski, Matthew and Shapiro, Lewis P
The Time-Course of Lexical Activation During Sentence Comprehension in People With Aphasia. American Journal of Speech-Language Pathology, 21(Suppl.), May, 2012, pages S179-S189.
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Purpose: To investigate the time-course of processing of lexical items in auditorily presented canonical (subject–verb–object) constructions in young, neurologically unimpaired control participants and participants with left-hemisphere damage and agrammatic aphasia.
Method: A cross modal picture priming (CMPP) paradigm was used to test 114 control participants and 8 participants with agrammatic aphasia for priming of a lexical item (direct object noun) immediately after it is initially encountered in the ongoing auditory stream and at 3 additional time points at 400-ms intervals.
Results: The control participants demonstrated immediate activation of the lexical item, followed by a rapid loss (decay). The participants with aphasia demonstrated delayed activation of the lexical item.
Conclusion: This evidence supports the hypothesis of a delay in lexical activation in people with agrammatic aphasia. The delay in lexical activation feeds syntactic processing too slowly, contributing to comprehension deficits in people with agrammatic aphasia.
|EPrint Type:||Journal (Paginated)|
|Keywords:||aphasia, syntax, slow rise-time, rate of speech, online, priming, sentence processing, neurolinguistics|
|Conference:||Clinical Aphasiology Conference: Clinical Aphasiology Conference (2011 : 41st : Fort Lauderdale, FL : May 31-June 4, 2011)|
|Publication:||American Journal of Speech-Language Pathology|
|DOI or Unique Handle:||10.1044/1058-0360(2012/11-0109)|
|Additional Information:||This article is based on a paper originally presented at the CAC2011 Conference. Permission to view the full-text articles is subject to the publisher’s access restrictions.|
Available Versions of this Item
- The time-course of lexical activation during sentence comprehension in aphasia (deposited 10 August 2011)
- The Time-Course of Lexical Activation During Sentence Comprehension in People With Aphasia (deposited 05 July 2012) [Currently Displayed]