Media bias detection requires comprehensive integration of information derived from multiple news sources. Sentence-level political bias detection in news is no exception, and has proven to be a challenging task that requires an understanding of bias in consideration of the context. Inspired by the fact that humans exhibit varying degrees of writing styles, resulting in a diverse range of statements with different local and global contexts, previous work in media bias detection has proposed augmentation techniques to exploit this fact. Despite their success, we observe that these techniques introduce noise by over-generalizing bias context boundaries, which hinders performance. To alleviate this issue, we propose techniques to more carefully search for context using a bias-sensitive, target-aware approach for data augmentation. Comprehensive experiments on the well-known BASIL dataset show that when combined with pre-trained models such as BERT, our augmentation techniques lead to state-of-the-art results. Our approach outperforms previous methods significantly, obtaining an F1-score of 58.15 over state-of-the-art bias detection task.

媒体偏见检测需要综合多个新闻来源的信息，以句子级别的政治偏见检测为例，通过考虑上下文中的偏见而进行的任务被证明是一项具有挑战性的任务。我们提出了一种更加小心地搜索上下文的技术，采用偏见敏感和目标感知的数据增强方法，通过与BERT等预训练模型的结合，在著名的BASIL数据集上进行了综合实验，取得了58.15的F1得分，明显优于先前方法的最新偏见检测任务。

新闻中的目标感知背景政治偏见检测