Linguistic Productivity: the Case of Determiners in English
Summary
The paper tests whether children need innate syntactic categories in order to freely combine the same noun with different articles (a / the). The alternative hypothesis is that this ability emerges solely from the statistics of the speech children hear. The authors combine corpus analysis with computational modeling. The data come from two corpora of adult–child conversations. The first is Manchester. The second is the much larger Language Development Project (LDP), which also covers younger ages. Productivity is assessed in two ways: with the classic overlap score and with the onset measure, which requires less data. A Transformer model with no predefined categories is trained from scratch on child-directed speech. Its output is then compared with children's output at different developmental stages. At early stages, children do not yet use articles productively; this emerges at around 30 months. The model closely reproduces this trajectory, including the point at which productivity emerges. This ability can therefore be explained by learning from the input without a priori categories. The approach itself is not tied to a specific construction.
Key points
- Corpora. LDP covers 64 children from the Chicago area aged 14 to 58 months and contains over 1 million transcribed utterances: ~647K from parents and ~369K from children. Manchester covers 12 children aged 20 to 36 months. Parts of speech were tagged with spaCy, and the preprocessing code is available on OSF.
- Metrics. The overlap score is computed only for samples of at least 50 constructions. The onset measure registers productivity when a child uses both a and the with the same noun within a single session, for at least two different nouns.
- Result. Children begin to use articles productively only at around 30 months. For the LDP children, the onset of productivity in the model correlates strongly with the onset in the child.
- The model does not simply memorize. It produces article–noun combinations that did not occur in the training data, for example "a daffodil". Predictions on parents' and children's utterances do not differ significantly.
- Limitations. The model was trained on pooled data from all caregivers, so individual differences between children are not modeled. The study covers only one category (determiners) and only English.
Cited by
Cite
@inproceedings{alhama2023linguistic,
title = {{Linguistic Productivity: the Case of Determiners in English}},
author = {Alhama, Raquel G. and Foushee, Ruthe and Byrne, Daniel and Ettinger, Allyson and Goldin-Meadow, Susan and Alishahi, Afra},
booktitle = {Proceedings of the 13th International Joint Conference on Natural Language Processing and the 3rd Conference of the Asia-Pacific Chapter of the Association for Computational Linguistics (Volume 1: Long Papers)},
year = {2023},
doi = {10.18653/v1/2023.ijcnlp-main.21},
url = {https://doi.org/10.18653/v1/2023.ijcnlp-main.21}
}References
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