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September 8, 2026Aphasiology

Semantic dependency network approach to the lexico-semantic impairment of Mandarin-speaking patients with probable Alzheimer’s dementia

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Authors

JLJianpeng LiuHSHongyan ShiHLHaitao Liu

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Overview

Case-control study demonstrates reduced semantic dependency diversity and simplified event representation in Alzheimer dementia, indicating multi-level lexico-semantic processing deficits.

Key Points

  • To evaluate semantic dependency distributions, event representation structures, and semantic connection strength in the connected speech of individuals with probable Alzheimer's dementia.
  • Constructed and analyzed semantic dependency treebanks and network graphs using Cookie Theft Picture descriptions.
  • Evaluated 50 Mandarin-speaking participants with probable Alzheimer's dementia (mean MoCA = 17.44) alongside 50 age-, gender-, and education-matched healthy controls (mean MoCA = 26.02).
  • Speech in dementia patients exhibited a smaller variety of semantic dependency relations and markedly simplified, direct event construction compared to the flexible, multi-layered processing of controls.
  • Patients' high in-degree network hubs were dominated by content words rather than grammatical function words, emphasizing core Experiencer thematic relations over Patient relations.

Cite This Study

Liu et al. (2026) studied this question.

synapsesocial.com/papers/6a9fd76758e84d0ff5b45f94https://doi.org/10.1080/02687038.2026.2729376
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Also Consider

Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Deterioration of Lexical Processing in Older Chinese Adults With Alzheimer's Disease: Insights From Reading Chinese Compounds2025
  2. 2Dependency Grammar Approach to the Syntactic Complexity in the Discourse of Alzheimer Patients2025
  3. 3Language processing in Mandarin sentence repetition in people with Alzheimer’s disease2026
  4. 4Word-Form and Lemma Dependency Networks of Connected Speech in Probable Alzheimer's Disease: Morphological Impacts on Syntactic Topological Metrics2026
  5. 5A – 22 Differences in Expressive Language Functions between Mild Alzheimer's Dementia and Mild Vascular Dementia2025