Abstract:
:The formation of the past tense of verbs in English has been the focus of the debate concerning connectionist vs. symbolic accounts of language. Brain-injured patients differ with respect to whether they are more impaired in generating irregular past tenses (TAKE-TOOK) or past tenses for nonce verbs (WUG-WUGGED). Such dissociations have been taken as evidence for distinct "rule" and "associative" memory systems in morphology and against the connectionist approach in which a single system is used for all forms. We describe a simulation model in which these impairments arise from damage to phonological or semantic information, which have different effects on generalization and irregular forms, respectively. The results provide an account of the bases of impairments in verb morphology and show that these impairments can be explained within connectionist models that do not use rules or a separate mechanism for exceptions.
journal_name
Proc Natl Acad Sci U S Aauthors
Joanisse MF,Seidenberg MSdoi
10.1073/pnas.96.13.7592keywords:
subject
Has Abstractpub_date
1999-06-22 00:00:00pages
7592-7issue
13eissn
0027-8424issn
1091-6490journal_volume
96pub_type
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