Automatic Metrics in Natural Language Generation: A Survey of Current Evaluation Practices
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Abstract (arXiv)
Automatic metrics are extensively used to evaluate natural language processing systems. However, there has been increasing focus on how they are used and reported by practitioners within the field. In this paper, we have conducted a survey on the use of automatic metrics, focusing particularly on natural language generation (NLG) tasks. We inspect which metrics are used as well as why they are chosen and how their use is reported. Our findings from this survey reveal significant shortcomings, including inappropriate metric usage, lack of implementation details and missing correlations with human judgements. We conclude with recommendations that we believe authors should follow to enable more rigour within the field.
Key facts. Cited by 19 papers in the map (data through 7 Oct 2026). Builds on 72 of its 133 references that are in the map. First posted on arXiv 17 Aug 2024.
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72 of 133 references.
References · 72
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- 2023AlignScore: Evaluating Factual Consistency with a Unified Alignment Functioncited by 284
- 2020Evaluation of Text Generation: A Surveycited by 275
- 2022Towards a Unified Multi-Dimensional Evaluator for Text Generationcited by 264
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- 2026SurveyReview: A Reviewer-Aligned Benchmark for Survey Evaluators7 Aug 2026
- 2026MATCHA: Matching Text via Contrastive Semantic Alignment26 May 2026
- 2026Creativity Bias: How Machine Evaluation Struggles with Creativity in Literary Translations13 May 2026
- 2026Benchmarked Yet Not Measured -- Generative AI Should be Evaluated Against Real-World Utility7 May 2026
- 2026Impact of enriched meaning representations for language generation in dialogue tasks: A comprehensive exploration of the relevance of tasks, corpora and metrics31 Mar 2026
- 2026What Are We Measuring in NLG? A Meta-Analysis of Evaluation Trends 2020-202512 Jan 2026
- 2026Computational Compliance for AI Regulation: Blueprint for a New Research Domain8 Jan 2026
- 2025CLEAR: A Comprehensive Linguistic Evaluation of Argument Rewriting by Large Language Models18 Sep 2025
- 2025Can LLM-Generated Textual Explanations Enhance Model Classification Performance? An Empirical Study13 Aug 2025
- 2025Real-World Summarization: When Evaluation Reaches Its Limits15 Jul 2025
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