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arXiv 2404.08078cs.CLcs.AIcs.LG

SQBC:利用大语言模型生成的合成数据开展在线政治讨论立场检测的主动学习

SQBC: Active Learning using LLM-Generated Synthetic Data for Stance Detection in Online Political Discussions

Heinrich Heine University Düsseldorf(海因里希·海涅杜塞尔多夫大学);Technical University of Dortmund(多特蒙德工业大学)

Stefan Sylvius Wagner, Maike Behrendt, Marc Ziegele, Stefan Harmeling

AI总结:

针对立场检测模型标注数据不足的问题,本研究提出用LLM合成数据扩充小型微调数据集,还提出基于委员会查询的SQBC主动学习方法,以合成数据为预言机筛选高价值未标注样本,实验证明两种方法均能提升性能,主动筛选样本微调效果甚至超完整数据集。

摘要:

立场检测是众多分析或支撑在线政治讨论的应用中的一项重要任务。常见方法包括对基于Transformer的模型进行微调,但这类模型需要大量标注数据,而这类数据可能难以获取。本研究提出两种利用大语言模型(LLM)生成的合成数据来训练并优化在线政治讨论立场检测智能体的不同方式:第一,研究表明用合成数据扩充小型微调数据集能够提升立场检测模型的性能。第二,我们提出了一种名为SQBC的新型主动学习方法,该方法基于“委员会查询(Query-by-Committee)”思路,核心是将LLM生成的合成数据作为预言机,用以识别信息量最高的未标注样本,筛选出来供人工标注。综合实验显示,两种思路均能提升立场检测性能。值得注意的是,我们观察到基于主动筛选样本进行微调的效果能够超过使用完整数据集的性能。

英文摘要:

Stance detection is an important task for many applications that analyse or support online political discussions. Common approaches include fine-tuning transformer based models. However, these models require a large amount of labelled data, which might not be available. In this work, we present two different ways to leverage LLM-generated synthetic data to train and improve stance detection agents for online political discussions: first, we show that augmenting a small fine-tuning dataset with synthetic data can improve the performance of the stance detection model. Second, we propose a new active learning method called SQBC based on the "Query-by-Comittee" approach. The key idea is to use LLM-generated synthetic data as an oracle to identify the most informative unlabelled samples, that are selected for manual labelling. Comprehensive experiments show that both ideas can improve the stance detection performance. Curiously, we observed that fine-tuning on actively selected samples can exceed the performance of using the full dataset.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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