A Quest for Paradigm Coverage: The Story of Nen

Saliha Muradoglu, Hanna Suominen, Nicholas Evans


Abstract
Language documentation aims to collect a representative corpus of the language. Nevertheless, the question of how to quantify the comprehensive of the collection persists. We propose leveraging computational modelling to provide a supplementary metric to address this question in a low-resource language setting. We apply our proposed methods to the Papuan language Nen. Nen is actively in the process of being described and documented. Given the enormity of the task of language documentation, we focus on one subdomain, namely Nen verbal morphology. This study examines four verb types: copula, positional, middle, and transitive. We propose model-based paradigm generation for each verb type as a new way to measure completeness, where accuracy is analogous to the coverage of the paradigm. We contrast the paradigm attestation within the corpus (constructed from fieldwork data) and the accuracy of the paradigm generated by Transformer models trained for inflection. This analysis is extended by extrapolating from the learning curve established to provide predictions for the quantity of data required to generate a complete paradigm correctly. We also explore the correlation between high-frequency morphosyntactic features and model accuracy. We see a positive correlation between high-frequency feature combinations and model accuracy, but this is only sometimes the case. We also see high accuracy for low-frequency morphosyntactic features. Our results show that model coverage is significantly higher for the middle and transitive verbs but not the positional verb. This is an interesting finding, as the positional verb paradigm is the smallest of the four.
Anthology ID:
2023.fieldmatters-1.9
Volume:
Proceedings of the Second Workshop on NLP Applications to Field Linguistics
Month:
May
Year:
2023
Address:
Dubrovnik, Croatia
Editors:
Oleg Serikov, Ekaterina Voloshina, Anna Postnikova, Elena Klyachko, Ekaterina Vylomova, Tatiana Shavrina, Eric Le Ferrand, Valentin Malykh, Francis Tyers, Timofey Arkhangelskiy, Vladislav Mikhailov
Venue:
FieldMatters
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
74–85
Language:
URL:
https://aclanthology.org/2023.fieldmatters-1.9
DOI:
10.18653/v1/2023.fieldmatters-1.9
Bibkey:
Cite (ACL):
Saliha Muradoglu, Hanna Suominen, and Nicholas Evans. 2023. A Quest for Paradigm Coverage: The Story of Nen. In Proceedings of the Second Workshop on NLP Applications to Field Linguistics, pages 74–85, Dubrovnik, Croatia. Association for Computational Linguistics.
Cite (Informal):
A Quest for Paradigm Coverage: The Story of Nen (Muradoglu et al., FieldMatters 2023)
Copy Citation:
PDF:
https://aclanthology.org/2023.fieldmatters-1.9.pdf
Video:
 https://aclanthology.org/2023.fieldmatters-1.9.mp4