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RankME: Reliable Human Ratings for Natural Language Generation

Jekaterina Novikova, Ondřej Dušek, Verena Rieser


Abstract
Human evaluation for natural language generation (NLG) often suffers from inconsistent user ratings. While previous research tends to attribute this problem to individual user preferences, we show that the quality of human judgements can also be improved by experimental design. We present a novel rank-based magnitude estimation method (RankME), which combines the use of continuous scales and relative assessments. We show that RankME significantly improves the reliability and consistency of human ratings compared to traditional evaluation methods. In addition, we show that it is possible to evaluate NLG systems according to multiple, distinct criteria, which is important for error analysis. Finally, we demonstrate that RankME, in combination with Bayesian estimation of system quality, is a cost-effective alternative for ranking multiple NLG systems.
Anthology ID:
N18-2012
Volume:
Proceedings of the 2018 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 2 (Short Papers)
Month:
June
Year:
2018
Address:
New Orleans, Louisiana
Editors:
Marilyn Walker, Heng Ji, Amanda Stent
Venue:
NAACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
72–78
Language:
URL:
https://aclanthology.org/N18-2012
DOI:
10.18653/v1/N18-2012
Bibkey:
Cite (ACL):
Jekaterina Novikova, Ondřej Dušek, and Verena Rieser. 2018. RankME: Reliable Human Ratings for Natural Language Generation. In Proceedings of the 2018 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, Volume 2 (Short Papers), pages 72–78, New Orleans, Louisiana. Association for Computational Linguistics.
Cite (Informal):
RankME: Reliable Human Ratings for Natural Language Generation (Novikova et al., NAACL 2018)
Copy Citation:
PDF:
https://aclanthology.org/N18-2012.pdf
Code
 jeknov/RankME
Data
E2E