Human Label Variation in Implicit Discourse Relation Recognition

Frances Yung, Daniil Ignatev, Merel Scholman, Vera Demberg, Massimo Poesio


Abstract
There is growing recognition that many NLP tasks lack a single ground truth, as human judgments reflect diverse perspectives. To capture this variation, models have been developed to predict full annotation distributions rather than majority labels, while perspectivist models aim to reproduce the interpretations of individual annotators. In this work, we compare these approaches on Implicit Discourse Relation Recognition (IDRR), a highly ambiguous task where disagreement often arises from cognitive complexity rather than ideological bias. Our experiments show that existing annotator-specific models perform poorly in IDRR unless ambiguity is reduced, whereas models trained on label distributions yield more stable predictions. Further analysis indicates that frequent cognitively demanding cases drive inconsistency in human interpretation, posing challenges for perspectivist modeling in IDRR.
Anthology ID:
2026.lrec-1.388
Volume:
Proceedings of the Fifteenth Language Resources and Evaluation Conference
Month:
May
Year:
2026
Address:
Palma de Mallorca, Spain
Editors:
Stelios Piperidis, Núria Bel, Henk van den Heuvel, Nancy Ide, Simon Krek, Antonio Toral
Venue:
LREC
SIG:
Publisher:
ELRA Language Resource Association
Note:
Pages:
4942–4954
Language:
External URL:
https://lrec.elra.info/lrec2026-main-388
DOI:
10.63317/3nah4z4ha8r4
Bibkey:
Cite (ACL):
Frances Yung, Daniil Ignatev, Merel Scholman, Vera Demberg, and Massimo Poesio. 2026. Human Label Variation in Implicit Discourse Relation Recognition. In Proceedings of the Fifteenth Language Resources and Evaluation Conference, pages 4942–4954, Palma de Mallorca, Spain. ELRA Language Resource Association.
Cite (Informal):
Human Label Variation in Implicit Discourse Relation Recognition (Yung et al., LREC 2026)
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