University of Illinois Urbana-Champaign

Is comprehension necessary for error detection? A conflict-based account of monitoring in speech production

Nozari, Nazbanou

Content Files
CodingScheme.pdf
Nozari_Nazbanou.pdf

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https://hdl.handle.net/2142/24331

Description

Title
Is comprehension necessary for error detection? A conflict-based account of monitoring in speech production
Author(s)
Nozari, Nazbanou
Issue Date
2011-05-25T14:51:32Z
Director of Research (if dissertation) or Advisor (if thesis)
Dell, Gary S.
Doctoral Committee Chair(s)
Dell, Gary S.
Committee Member(s)
  • Garnsey, Susan M.
  • Simons, Daniel J.
  • Coles, Michael G.H.
  • Bock, J. Kathryn
Department of Study
Psychology
Discipline
Psychology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Date of Ingest
2011-05-25T14:51:32Z
Keyword(s)
  • Speech errors
  • Speech monitoring
  • Domain-general mechanisms
  • Error detection
Abstract
Although speech is error-prone, verbal communication is successful because speakers can detect (and correct) their errors. The standard theory of speech-error detection, the perceptual-loop account, posits that the comprehension system monitors production output for errors. Such a comprehension-based monitor, however, cannot explain the double dissociation between comprehension and error-detection ability observed in the aphasic patients. We propose a new theory of speech-error detection which is, instead, based on the production process itself. The theory borrows from studies of forced-choiceresponse tasks the notion that error detection is accomplished by monitoring response conflict via a frontal brain structure, such as the anterior cingulate cortex. We implement this idea in the two-step model of word production, and test the model-derived predictions on a sample of aphasic patients. Our results show a strong correlation between patients’ error detection ability and the model’s characterization of their production skills, and no significant correlation between error detection and comprehension measures, thus supporting a production-based monitor, generally, and the implemented conflict-based monitor in particular. The successful application of the conflict-based theory to error detection in linguistic, as well as non-linguistic domains points to a domain-general monitoring system.
Graduation Semester
2011-05
Permalink
http://hdl.handle.net/2142/24331
Copyright and License Information
Copyright 2011 Nazbanou Nozari

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