arXiv AI By Przemys{\l}aw Czuma (Polish Association for Artificial Intelligence in Medicine)

The em-dash em-beds in Congress: A population-level rise in em-dash frequency in U.S. congressional press releases at the dawn of the large-language-model era, 2021-2025

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arXiv:2608. 05889v1 Announce Type: cross Abstract: Large language models (LLMs) can leave small stylistic traces in text written with their help.

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arXiv Computation and Language
Sep 11

More than half of recent astronomy papers are written with language-model assistance

The study analyzes 207,111 astronomy papers from 2015 to mid‑2026 to quantify how many contain language‑model‑generated vocabulary. Using a hierarchical Bayesian model calibrated on pre‑2020 unassisted papers and 392 papers that disclose model use, the authors estimate that in 2025 roughly 54% (±8% statistical, ±26% systematic) of papers show a language‑model trace, with the estimate remaining above 36% under various assumptions. Despite only 0.81% of 2025 papers explicitly declaring model assistance, the trace is pervasive, and the detectable signal is fading as authors adapt to the characteristic words. whyItMatters":"The findings reveal that language‑model assistance has become widespread in recent astronomy research, yet most authors do not disclose its use, highlighting a growing gap between actual practice and transparency in scholarly writing."

By Serat M. Saad, Yuan-Sen Ting
arXiv AI
Aug 24

The Divergence Hypothesis: Unmasking Lexical Interference and Label Bias in Mental Health NLP

The paper introduces TSS (Triple-Stream Stress probe), a diagnostic framework that splits text into lexical, morpho-syntactic, and psycholinguistic style channels to analyze mental health NLP classifiers. Across four English datasets, TSS uncovers a lexical interference effect where adding lexical features harms performance on human-labeled data but not on auto-labeled data, and proposes the Degree of Divergence (DoD) statistic to audit label-source bias. The study demonstrates that style features largely remain effective even after masking content words, emphasizing that shortcut learning is label-source specific rather than clinically relevant.

By Moustafa Yehia Hassan