arXiv — NLP / Computation & Language · · 3 min read

Detecting Synthetic Political Narratives in Cross-Platform Social Media Discourse

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Computer Science > Social and Information Networks

arXiv:2605.21540 (cs)
[Submitted on 20 May 2026]

Title:Detecting Synthetic Political Narratives in Cross-Platform Social Media Discourse

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Abstract:The proliferation of large language models has introduced a new paradigm of synthetic political communication in which narratives may be generated, semantically coordinated, and strategically disseminated across platforms at scale. We present a cross-platform framework for detecting synthetic political narratives using four coordination signals -- lexical diversity D(C), temporal burstiness B(C), rhetorical repetition R(C), and semantic homogenization H(C) -- combined into a Synthetic Narrative Coordination Score SNC(C).
We apply the framework to a corpus of 353,223 records spanning six geopolitical event windows collected from six Telegram channels and nine Reddit communities (2023--2026). Results show that IntelSlava exhibits the lowest lexical diversity (MATTR 0.52--0.54), the highest burstiness (B=+0.48 to +0.73), and the highest rhetorical overlap with peer channels (Jaccard 0.12), ranking first in the composite SNC(C) on four of six event windows (SNC 0.45--0.60). Rybar ranks last on all windows despite its high semantic homogenization, because its Russian-language output yields high lexical diversity and near-zero rhetorical Jaccard with English-language channels -- demonstrating that no single indicator is sufficient for coordination detection. Multi-dimensional SNC(C) scoring provides a more robust and interpretable signal than any individual metric.
Subjects: Social and Information Networks (cs.SI); Artificial Intelligence (cs.AI); Computation and Language (cs.CL); Computers and Society (cs.CY)
Cite as: arXiv:2605.21540 [cs.SI]
  (or arXiv:2605.21540v1 [cs.SI] for this version)
  https://doi.org/10.48550/arXiv.2605.21540
arXiv-issued DOI via DataCite (pending registration)

Submission history

From: Despoina Antonakaki [view email]
[v1] Wed, 20 May 2026 07:58:49 UTC (12,070 KB)
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