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Individual differences in the processing of referential dependencies: Evidence from event-related potentials.

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This study on pronoun resolution found that working memory and attention influence how people process ambiguous sentences. Referential failure in sentences triggered a P600 brainwave response in all participants.

Keywords:
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Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Computational Linguistics

Background:

  • Referential ambiguity and failure pose challenges in language comprehension.
  • Event-related potentials (ERPs) offer insights into real-time language processing.
  • Individual differences in cognitive abilities may modulate responses to linguistic ambiguity.

Purpose of the Study:

  • To investigate the neural processing of referential ambiguity and failure using ERPs.
  • To explore the relationship between working memory, attentional control, and ERP responses to referential ambiguity.
  • To examine how referential failure is processed neurally.

Main Methods:

  • Participants read sentences with varying degrees of referential ambiguity (one, two, or no gender-matching antecedents).
  • Event-related potentials (ERPs) were recorded during sentence reading.
  • Cognitive abilities were assessed using working memory (Count Span/Reading Span) and attentional control (Number Stroop) tasks.

Main Results:

  • Two distinct ERP patterns (sustained negativity - Nref, and sustained positivity) emerged in response to referential ambiguity.
  • Nref amplitude correlated positively with working memory capacity (Count Span).
  • Positivity effects were marginally related to attentional control (Stroop performance).
  • Referential failure consistently elicited a P600 ERP component across all participants.

Conclusions:

  • Individual cognitive abilities, specifically working memory and attentional control, differentially modulate neural responses to referential ambiguity.
  • The P600 response to referential failure suggests it is treated as a grammatical violation, irrespective of explicit judgment.
  • ERPs provide a valuable tool for dissecting the cognitive mechanisms underlying language comprehension and individual differences.