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Structural description of agrammatic comprehension

G Hickok1, E Zurif, E Canseco-Gonzalez

  • 1Massachusetts Institute of Technology.

Brain and Language
|October 1, 1993
PubMed
Summary
This summary is machine-generated.

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Agrammatic aphasia comprehension deficits are not solely due to trace deletion. Even when matrix clauses should be understood, deficits persist, challenging the original trace-deletion hypothesis.

Area of Science:

  • Neuroscience
  • Linguistics
  • Psychology

Background:

  • The trace-deletion hypothesis posits that agrammatic aphasia comprehension deficits stem from absent syntactic traces at S-structure.
  • This theory suggests that core sentence components should remain comprehensible.

Observation:

  • This study investigated the trace-deletion hypothesis in an agrammatic aphasic using sentence-picture matching and truth-value judgment tasks.
  • Comprehension of matrix clauses in center-embedded relative sentences was specifically examined.

Findings:

  • Contrary to predictions, the agrammatic participant showed significant impairment in comprehending the matrix clause of these complex sentences.
  • This indicates that the absence of traces alone does not fully account for comprehension deficits in agrammatic aphasia.

Related Experiment Videos

Implications:

  • The findings challenge the original trace-deletion hypothesis.
  • A revised trace-deletion hypothesis (Hickok, 1992) may better explain the observed data and other unaccounted findings in agrammatic aphasia research.