A case-series test of the interactive two-step model of lexical access: Predicting word repetition from picture naming

Gary S. Dell, Nadine Martin, Myrna F. Schwartz

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)490-520
Number of pages31
JournalJournal of Memory and Language
Volume56
Issue number4
DOIs
StatePublished - May 2007

Keywords

  • Aphasia
  • Computational models
  • Lexical access
  • Picture naming
  • Repetition

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Language and Linguistics
  • Experimental and Cognitive Psychology
  • Linguistics and Language
  • Artificial Intelligence

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