Target/error overlap in jargonaphasia: The case for a one-source model, lexical and non-lexical summation, and the special status of correct responses

Andrew Olson, Elizabeth Halloran, Cristina Romani

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)
217 Downloads (Pure)

Abstract

We present three jargonaphasic patients who made phonological errors in naming, repetition and reading. We analyze target/response overlap using statistical models to answer three questions: 1) Is there a single phonological source for errors or two sources, one for target-related errors and a separate source for abstruse errors? 2) Can correct responses be predicted by the same distribution used to predict errors or do they show a completion boost? 3) Is non-lexical and lexical information summed during reading and repetition? The answers were clear. 1) Abstruse errors did not require a separate distribution created by failure to access word forms. Abstruse and target-related errors were the endpoints of a single overlap distribution. 2) Correct responses required a special factor, e.g. a completion boost or lexical/phonological feedback, to preserve their integrity. 3) Reading and repetition required separate lexical and non-lexical contributions that were combined at output.
Original languageEnglish
Pages (from-to)158-179
JournalCortex
Volume73
Early online date26 Jul 2015
DOIs
Publication statusPublished - Dec 2015

Keywords

  • jargonaphasia
  • speech production
  • computational models
  • statistical models
  • aphasia
  • reading
  • naming
  • repetition

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