After this article [1] was published, concerns were raised that the article uses terminology that differs from standards in the field (e.g. “informational index” instead of “dataset”).
In addition, the PLOS One Editors have concerns about the article’s compliance with the PLOS Authorship policy.
In light of the cumulative issues, the PLOS One Editors issue this Expression of Concern. Readers are advised to interpret the article [1] with caution.
Reference
Citation: The PLOS One Editors (2026) Expression of Concern: Research on performance variations of classifiers with the influence of pre-processing methods for Chinese short text classification. PLoS One 21(2): e0343161. https://doi.org/10.1371/journal.pone.0343161
Published: February 18, 2026
Copyright: © 2026 The PLOS One Editors. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.