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ERIC Number: EJ972007
Record Type: Journal
Publication Date: 2012-May
Pages: 11
Abstractor: As Provided
Reference Count: 48
ISBN: N/A
ISSN: ISSN-1058-0360
The Time-Course of Lexical Activation during Sentence Comprehension in People with Aphasia
Ferrill, Michelle; Love, Tracy; Walenski, Matthew; Shapiro, Lewis P.
American Journal of Speech-Language Pathology, v21 n2 pS179-S189 May 2012
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. (Contains 3 tables, 2 figures and 5 footnotes.)
American Speech-Language-Hearing Association (ASHA). 10801 Rockville Pike, Rockville, MD 20852. Tel: 800-638-8255; Fax: 301-571-0457; e-mail: subscribe@asha.org; Web site: http://ajslp.asha.org
Publication Type: Journal Articles; Reports - Research
Education Level: Higher Education; Postsecondary Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: California