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Comparing the Frequency Effect Between the Lexical Decision and Naming Tasks in Chinese
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Lexical network properties in aphasic discourse production.

Juqiang Chen1,2, Hui Chang1,2

  • 1School of Foreign Languages, Shanghai Jiao Tong University, Shanghai, P. R. China.

Clinical Linguistics & Phonetics
|June 3, 2025
PubMed
Summary
This summary is machine-generated.

Lexical networks in discourse of people with aphasia (PWA) are smaller and less efficient than those of healthy controls. Despite constraints, PWA language networks retain some typical characteristics.

Keywords:
Aphasic discourselexical networksmodularitysmall-world networks

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Area of Science:

  • Neuroscience
  • Linguistics
  • Computational Linguistics

Background:

  • Discourse production assesses language competence in persons with aphasia (PWA).
  • Previous PWA discourse research focused on discrete linguistic measures.
  • A holistic view of linguistic interconnections in PWA discourse is needed.

Purpose of the Study:

  • To compare lexical networks of discourse produced by PWA with those of healthy controls.
  • To investigate macro-, meso-, and micro-level network characteristics.
  • To understand the efficiency and constraints of PWA language networks.

Main Methods:

  • Lexical network analysis of discourse produced by PWA and healthy controls.
  • Comparison of network size, diameter, density, and small-worldness.
  • Analysis of network modularity and node degree distribution.

Main Results:

  • PWA networks exhibited smaller size and diameter but higher density compared to controls.
  • PWA networks had lower small-worldness and modularity than controls.
  • Node degrees in both groups followed a power-law distribution (scale-free networks).

Conclusions:

  • Lexical networks in PWA discourse are constrained and less efficient.
  • PWA language networks retain some basic characteristics of typical networks.
  • Network analysis offers insights into the linguistic capabilities of PWA.