Search Results for author: Lele Sha

Found 4 papers, 2 papers with code

Bigger Data or Fairer Data? Augmenting BERT via Active Sampling for Educational Text Classification

1 code implementation COLING 2022 Lele Sha, Yuheng Li, Dragan Gasevic, Guanliang Chen

Pretrained Language Models (PLMs), though popular, have been diagnosed to encode bias against protected groups in the representations they learn, which may harm the prediction fairness of downstream models.

Fairness text-classification +1

Towards Detecting AI-Generated Text within Human-AI Collaborative Hybrid Texts

no code implementations6 Mar 2024 Zijie Zeng, Shiqi Liu, Lele Sha, Zhuang Li, Kaixun Yang, Sannyuya Liu, Dragan Gašević, Guanliang Chen

Our empirical findings highlight (1) detecting AI-generated sentences in hybrid texts is overall a challenging task because (1. 1) human writers' selecting and even editing AI-generated sentences based on personal preferences adds difficulty in identifying the authorship of segments; (1. 2) the frequent change of authorship between neighboring sentences within the hybrid text creates difficulties for segment detectors in identifying authorship-consistent segments; (1. 3) the short length of text segments within hybrid texts provides limited stylistic cues for reliable authorship determination; (2) before embarking on the detection process, it is beneficial to assess the average length of segments within the hybrid text.

Sentence Sentence Classification +2

Towards Automatic Boundary Detection for Human-AI Collaborative Hybrid Essay in Education

2 code implementations23 Jul 2023 Zijie Zeng, Lele Sha, Yuheng Li, Kaixun Yang, Dragan Gašević, Guanliang Chen

Then we proposed a two-step approach where we (1) separated AI-generated content from human-written content during the encoder training process; and (2) calculated the distances between every two adjacent prototypes and assumed that the boundaries exist between the two adjacent prototypes that have the furthest distance from each other.

Boundary Detection Text Detection

Practical and Ethical Challenges of Large Language Models in Education: A Systematic Scoping Review

no code implementations17 Mar 2023 Lixiang Yan, Lele Sha, Linxuan Zhao, Yuheng Li, Roberto Martinez-Maldonado, Guanliang Chen, Xinyu Li, Yueqiao Jin, Dragan Gašević

Educational technology innovations leveraging large language models (LLMs) have shown the potential to automate the laborious process of generating and analysing textual content.

Question Generation Question-Generation

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