Cited by 235Natural Language Processing TechniquesTopic ModelingSpeech and dialogue systems

A Survey of Evaluation Metrics Used for NLG Systems

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Sai, Ananya B., Mohankumar, Akash Kumar, Khapra, Mitesh M.·2023·ACM Computing Surveys

Abstract

In the last few years, a large number of automatic evaluation metrics have been proposed for evaluating Natural Language Generation (NLG) systems. The rapid development and adoption of such automatic evaluation metrics in a relatively short time has created the need for a survey of these metrics. In this survey, we (i) highlight the challenges in automatically evaluating NLG systems, (ii) propose a coherent taxonomy for organising existing evaluation metrics, (iii) briefly describe different existing metrics, and finally (iv) discuss studies criticising the use of automatic evaluation metrics. We then conclude the article highlighting promising future directions of research.

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  • Intrinsic metrics lack the capability to capture semantics, context, distant dependencies, semantically critical ordering change, and human perspectives, particularly in real-world scenarios.

    “These metrics lack the capability to capture essential elements such as semantics19,20, context19,21, distant dependencies22,23, semantically critical ordering change21, and human perspectives, particularly in real-world scenarios.”
  • Intrinsic evaluation metrics solely rely on surface-form similarity and language-specific perspectives, rendering them inadequate for healthcare chatbots.

    “However, they solely rely on surface-form similarity and language-specific perspectives, rendering them inadequate for healthcare chatbots.”

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Authors
Sai, A. B., Mohankumar, A. K., & Khapra, M. M.
Affiliations
Indian Institute of Technology Madras (IN)
Venue
ACM Computing Surveys
Published
2022-01-18
Volume
55
Issue
2
Pages
1-39
ISSN
  • 0360-0300 (ISSN-L)
  • 1557-7341
OpenAlex
W3080855795
Cited by
235
References
189
Citations by year
2026: 52 · 2025: 53 · 2024: 29 · 2023: 56 · 2022: 27 · 2021: 17 · 2020: 1
FWCI
13.52
Type
journal article
Language
en
Open access
Locations
  • ACM Computing Surveys (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Funders
  • Department of Computer Science and Engineering
  • Robert Bosch Center for Data Science and Artificial Intelligence
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Natural Language Processing Techniques
  • Physical Sciences › Computer Science › Artificial Intelligence › Topic Modeling
  • Physical Sciences › Computer Science › Artificial Intelligence › Speech and dialogue systems
Keywords
natural language generation, automatic evaluation metrics, evaluation taxonomy, human evaluation

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