MENLI: Robust Evaluation Metrics from Natural Language Inference

• URL: http://arxiv.org/abs/2208.07316v5
• Date: Tue, 26 Dec 2023 04:11:04 GMT
• Title: MENLI: Robust Evaluation Metrics from Natural Language Inference
• Authors: Yanran Chen and Steffen Eger
• Abstract summary: Recently proposed BERT-based evaluation metrics for text generation perform well on standard benchmarks but are vulnerable to adversarial attacks. We develop evaluation metrics based on Natural Language Inference (NLI) We show that our NLI based metrics are much more robust to the attacks than the recent BERT-based metrics.
• Score: 26.53850343633923
• License: http://creativecommons.org/licenses/by-sa/4.0/
• Abstract: Recently proposed BERT-based evaluation metrics for text generation perform well on standard benchmarks but are vulnerable to adversarial attacks, e.g., relating to information correctness. We argue that this stems (in part) from the fact that they are models of semantic similarity. In contrast, we develop evaluation metrics based on Natural Language Inference (NLI), which we deem a more appropriate modeling. We design a preference-based adversarial attack framework and show that our NLI based metrics are much more robust to the attacks than the recent BERT-based metrics. On standard benchmarks, our NLI based metrics outperform existing summarization metrics, but perform below SOTA MT metrics. However, when combining existing metrics with our NLI metrics, we obtain both higher adversarial robustness (15%-30%) and higher quality metrics as measured on standard benchmarks (+5% to 30%).

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