Text Readability and Simplification Open access

Results of Crowdsourcing Human Evaluation of SyntheticSimplification

Vincent Vandeghinste, Bram Vanroy, Job Van Doeselaar

Linköping electronic conference proceedings | Jun 29, 2026

Abstract

Abstract

This paper describes the creation of a set of crowd-sourced human evaluations of automated simplifications. We created a synthetic simplification dataset which was assessed by the crowd on dimensions of fluency, clarity, accuracy and complexity. We briefly describe the crowdsourcing environment and some techniques to keep the crowd engaged. This resulted in a dataset of nearly 25,000 responses from 384 respondents on synthetically simplified Dutch data. In order to mitigate the low inter-annotator agreement we investigate the effect of outlier removal techniques on Krippendorf α. The main conclusions stay the same: the synthetic texts are not simpler according to the linguistic proxies investigated, but the crowd judged that in about 80% of the cases the synthetic text was more clear than the original and less complex in about 70% of the cases. The fluency was the same for original sentences versus synthetic sentences, and in the case of accuracy the numbers changed most after outlier removal. A medium accuracy was achieved in about 80%, a high accuracy in 50% before outlier removal and 60% after outlier removal. Both the synthetic parallel data as well as the crowd assessments are made available to the CLARIN infrastructure.

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Vincent Vandeghinste

first | Zorginstituut Nederland

Bram Vanroy

middle | Zorginstituut Nederland

Job Van Doeselaar

last | Zorginstituut Nederland

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Citation

BibTeX

@article{Vandeghinste2026Results,
  title = {Results of Crowdsourcing Human Evaluation of SyntheticSimplification},
  author = {Vincent Vandeghinste and Bram Vanroy and Job Van Doeselaar},
  journal = {Linköping electronic conference proceedings},
  year = {2026},
  doi = {10.3384/ecp222.1595},
  url = {https://doi.org/10.3384/ecp222.1595}
}

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