Annotators of a Feather FLOCKE Together: A Framework to Analyze Latent Group Patterns Based on Annotator Behavior

Giovanni Valer, Elisa Leonardelli, Camilla Casula, Sara Tonelli, Michele Lombardi


Abstract
Accounting for disagreement among annotators is important for a variety of NLP applications. However, understanding what insights can be drawn from disaggregated annotations remains an open question. We introduce FLOCKE, a framework that jointly learns a task and models latent groups of annotators with similar behavior. We first formalize six analyses enabled by our framework, including annotator-group discovery, group- and individual-level label prediction, and finding the items most prone to cause disagreement. We then validate FLOCKE with a controlled synthetic benchmark, creating predefined annotator groups and labeling patterns, and showing that it can recover group structure with very high accuracy. We apply FLOCKE to two real-world datasets, where it predicts individual annotations, discovers interpretable annotator groups, and shows that groups are not explained by socio-demographic traits alone.
Anthology ID:
2026.emnlp-main.2665
Volume:
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
60662–60676
Language:
URL:
https://aclanthology.org/2026.emnlp-main.2665/
DOI:
Bibkey:
Cite (ACL):
Giovanni Valer, Elisa Leonardelli, Camilla Casula, Sara Tonelli, and Michele Lombardi. 2026. Annotators of a Feather FLOCKE Together: A Framework to Analyze Latent Group Patterns Based on Annotator Behavior. In Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing, pages 60662–60676, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
Annotators of a Feather FLOCKE Together: A Framework to Analyze Latent Group Patterns Based on Annotator Behavior (Valer et al., EMNLP 2026)
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PDF:
https://aclanthology.org/2026.emnlp-main.2665.pdf