TY - JOUR
T1 - A case-series test of the interactive two-step model of lexical access
T2 - Predicting word repetition from picture naming
AU - Dell, Gary S.
AU - Martin, Nadine
AU - Schwartz, Myrna F.
N1 - Funding Information:
This project is supported by a grant from the NIH: R01 DC00191 (M.F. Schwartz) and DC01924 (N. Martin). The authors are grateful to all who participated in the study and to the speech-language pathologists of the Center for Communication Disorders of the Moss Rehabilitation Research Institute and other Philadelphia-area facilities who referred these individuals to us. We acknowledge with thanks the important contributions of Paula Sobel and Adelyn Brecher, which include patient testing, scoring, and data management and Judy Allen for work on the manuscript. We are also grateful for valuable comments from Matt Lambon Ralph, Merrill Garrett, and an anonymous reviewer.
PY - 2007/5
Y1 - 2007/5
N2 - Lexical access in language production, and particularly pathologies of lexical access, are often investigated by examining errors in picture naming and word repetition. In this article, we test a computational approach to lexical access, the two-step interactive model, by examining whether the model can quantitatively predict the repetition-error patterns of 65 aphasic subjects from their naming errors. The model's characterizations of the subjects' naming errors were taken from the companion paper to this one (Schwartz, M. F., Dell, G. S., Martin, N., Gahl, S., & Sobel, P. (2006). A case-series test of the interactive two-step model of lexical access: evidence from picture naming. Journal of Memory and Language, 54, 228-264), and their repetition was predicted from the model on the assumption that naming involves two error prone steps, word and phonological retrieval, whereas repetition only creates errors in the second of these steps. A version of the model in which lexical-semantic and lexical-phonological connections could be independently lesioned was generally successful in predicting repetition for the aphasics. An analysis of the few cases in which model predictions were inaccurate revealed the role of input phonology in the repetition task.
AB - Lexical access in language production, and particularly pathologies of lexical access, are often investigated by examining errors in picture naming and word repetition. In this article, we test a computational approach to lexical access, the two-step interactive model, by examining whether the model can quantitatively predict the repetition-error patterns of 65 aphasic subjects from their naming errors. The model's characterizations of the subjects' naming errors were taken from the companion paper to this one (Schwartz, M. F., Dell, G. S., Martin, N., Gahl, S., & Sobel, P. (2006). A case-series test of the interactive two-step model of lexical access: evidence from picture naming. Journal of Memory and Language, 54, 228-264), and their repetition was predicted from the model on the assumption that naming involves two error prone steps, word and phonological retrieval, whereas repetition only creates errors in the second of these steps. A version of the model in which lexical-semantic and lexical-phonological connections could be independently lesioned was generally successful in predicting repetition for the aphasics. An analysis of the few cases in which model predictions were inaccurate revealed the role of input phonology in the repetition task.
KW - Aphasia
KW - Computational models
KW - Lexical access
KW - Picture naming
KW - Repetition
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U2 - 10.1016/j.jml.2006.05.007
DO - 10.1016/j.jml.2006.05.007
M3 - Article
AN - SCOPUS:33947508000
SN - 0749-596X
VL - 56
SP - 490
EP - 520
JO - Journal of Memory and Language
JF - Journal of Memory and Language
IS - 4
ER -