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Register a new userCLIFF: Contrastive Learning for Improving Faithfulness and Factuality in Abstractive Summarization
CLIFF: التعلم المتعاقل لتحسين الإخلاص والوصيل في تلخيص مبادرة
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نحن ندرس توليد ملخصات مبادرة مخلصة ومتسقة فعليا مع المقالات المعينة. يتم تقديم صياغة تعليمية متناقضة جديدة، والتي ترفف كل من الملخصات المرجعية، كبيانات تدريب إيجابية، وإنشائها تلقائيا ملخصات خاطئة، كبيانات تدريب سلبية، لتدريب أنظمة التلخيص التي تكون أفضل في التمييز بينهما. ونحن كذلك تصميم أربعة أنواع من الاستراتيجيات لإنشاء عينات سلبية، لتشبه الأخطاء التي تحدث عادة من قبل نماذج من أحدث نماذج، بارت وبيغاسوس، الموجودة في التعليقات التوضيحية البشرية الجديدة من الأخطاء الموجزة. تجارب على Xsum و CNN / Daily Mail تشير إلى أن إطار التعلم المتعاقل لدينا قوي عبر مجموعات البيانات والنماذج. ينتج باستمرار ملخصات واقعية أكثر من المقارنات القوية مع تصحيح الأخطاء بعد وإعادة التشغيل القائمة على الاستقبال، والتدريب غير المباشر، وفقا لتقييم الواقعية القائم على الجودة. صدى القضاة البشرية الملاحظة وتجد أن ملخصاتنا النموذجية تصحح المزيد من الأخطاء.
We study generating abstractive summaries that are faithful and factually consistent with the given articles. A novel contrastive learning formulation is presented, which leverages both reference summaries, as positive training data, and automatically generated erroneous summaries, as negative training data, to train summarization systems that are better at distinguishing between them. We further design four types of strategies for creating negative samples, to resemble errors made commonly by two state-of-the-art models, BART and PEGASUS, found in our new human annotations of summary errors. Experiments on XSum and CNN/Daily Mail show that our contrastive learning framework is robust across datasets and models. It consistently produces more factual summaries than strong comparisons with post error correction, entailment-based reranking, and unlikelihood training, according to QA-based factuality evaluation. Human judges echo the observation and find that our model summaries correct more errors.
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Despite significant progress in neural abstractive summarization, recent studies have shown that the current models are prone to generating summaries that are unfaithful to the original context. To address the issue, we study contrast candidate gener
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