Lexical representation for oral reading and writing/spelling: evidence from aphasia
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1
Seton Hall University, Speech-Language Pathology , United States
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2
Seton Hall University, Speech-Language Pathology, United States
The 'common lexicon theory' (CLT) postulates that one single mental lexicon serves both reading and writing (Coltheart & Funnell, 1987), whereas the 'independent lexicon theory' (ILT) claims that the input orthographic lexicon for reading is separate from the output orthographic lexicon for writing (Rapp 2002). These theories deserve to be investigated further because they rest on data from a few case studies that were inconclusive. The objectives of the current study were 1) to analyze the reading and writing performance of an aphasic, and 2) to discuss the issue of 'common' versus 'independent' lexicon theories in the face of the data obtained from an aphasic patient. LK, a 45-year-old right-handed male school teacher with a stroke induced lesion in the left temporo-frontal and basal ganglia areas served as the subject of the current study. LK was tested on clinical test batteries such as 1) Boston Diagnostic Aphasia Examination, 2) Boston Naming Test, 3) Reading Comprehension Battery for Aphasics , and 4) Discourse Comprehension Test. LK's language performance profile on these batteries revealed a moderate-severe Broca's aphasia. LK was also tested on two major experimental tests that focused on oral reading and writing: 1) Psycholinguistic Assessment of Language Performance in Aphasia (Kay, Lesser, & Coltheart, 1992), and 2) Subtests of Johns Hopkins University Dysgraphia Battery. In LK's performance, both reading and writing were found to be influenced by factors such as grammatical class, imageability and word frequency, spelling regularity, non-word, and homophone. Although the similar patterns of response in LK's reading and writing could be construed as supportive evidence for the CLT, the discrepancy between the presence of semantic substitutions in reading and its absence in writing would warrant a cautious interpretation.
Keywords:
Aphasia,
Writing,
representation,
reading,
Lexicon
Conference:
XII International Conference on Cognitive Neuroscience (ICON-XII), Brisbane, Queensland, Australia, 27 Jul - 31 Jul, 2014.
Presentation Type:
Poster
Topic:
Language
Citation:
Balasubramanian
V,
Aldera
M and
Costello
M
(2015). Lexical representation for oral reading and writing/spelling: evidence from aphasia.
Conference Abstract:
XII International Conference on Cognitive Neuroscience (ICON-XII).
doi: 10.3389/conf.fnhum.2015.217.00097
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Received:
19 Feb 2015;
Published Online:
24 Apr 2015.
*
Correspondence:
Dr. Venugopal Balasubramanian, Seton Hall University, Speech-Language Pathology, Piscataway, United States, venugopal.balasubramanian@shu.edu