Fine-Grained Natural Language Inference Based Faithfulness Evaluation for Diverse Summarisation Tasks

• URL: http://arxiv.org/abs/2402.17630v1
• Date: Tue, 27 Feb 2024 15:57:11 GMT
• Title: Fine-Grained Natural Language Inference Based Faithfulness Evaluation for Diverse Summarisation Tasks
• Authors: Huajian Zhang, Yumo Xu, Laura Perez-Beltrachini
• Abstract summary: We study existing approaches to leverage off-the-shelf Natural Language Inference (NLI) models for the evaluation of summary faithfulness. We propose a novel approach, namely InFusE, that uses a variable premise size and simplifies summary sentences into shorter hypotheses.
• Score: 14.319567507959759
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We study existing approaches to leverage off-the-shelf Natural Language Inference (NLI) models for the evaluation of summary faithfulness and argue that these are sub-optimal due to the granularity level considered for premises and hypotheses. That is, the smaller content unit considered as hypothesis is a sentence and premises are made up of a fixed number of document sentences. We propose a novel approach, namely InFusE, that uses a variable premise size and simplifies summary sentences into shorter hypotheses. Departing from previous studies which focus on single short document summarisation, we analyse NLI based faithfulness evaluation for diverse summarisation tasks. We introduce DiverSumm, a new benchmark comprising long form summarisation (long documents and summaries) and diverse summarisation tasks (e.g., meeting and multi-document summarisation). In experiments, InFusE obtains superior performance across the different summarisation tasks. Our code and data are available at https://github.com/HJZnlp/infuse.

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