Rearranging the Familiar: Testing Compositional Generalization in Recurrent Networks

João Loula, Marco Baroni, Brenden Lake


Abstract
Systematic compositionality is the ability to recombine meaningful units with regular and predictable outcomes, and it’s seen as key to the human capacity for generalization in language. Recent work (Lake and Baroni, 2018) has studied systematic compositionality in modern seq2seq models using generalization to novel navigation instructions in a grounded environment as a probing tool. Lake and Baroni’s main experiment required the models to quickly bootstrap the meaning of new words. We extend this framework here to settings where the model needs only to recombine well-trained functional words (such as “around” and “right”) in novel contexts. Our findings confirm and strengthen the earlier ones: seq2seq models can be impressively good at generalizing to novel combinations of previously-seen input, but only when they receive extensive training on the specific pattern to be generalized (e.g., generalizing from many examples of “X around right” to “jump around right”), while failing when generalization requires novel application of compositional rules (e.g., inferring the meaning of “around right” from those of “right” and “around”).
Anthology ID:
W18-5413
Volume:
Proceedings of the 2018 EMNLP Workshop BlackboxNLP: Analyzing and Interpreting Neural Networks for NLP
Month:
November
Year:
2018
Address:
Brussels, Belgium
Editors:
Tal Linzen, Grzegorz Chrupała, Afra Alishahi
Venue:
EMNLP
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
108–114
Language:
URL:
https://aclanthology.org/W18-5413
DOI:
10.18653/v1/W18-5413
Bibkey:
Cite (ACL):
João Loula, Marco Baroni, and Brenden Lake. 2018. Rearranging the Familiar: Testing Compositional Generalization in Recurrent Networks. In Proceedings of the 2018 EMNLP Workshop BlackboxNLP: Analyzing and Interpreting Neural Networks for NLP, pages 108–114, Brussels, Belgium. Association for Computational Linguistics.
Cite (Informal):
Rearranging the Familiar: Testing Compositional Generalization in Recurrent Networks (Loula et al., EMNLP 2018)
Copy Citation:
PDF:
https://aclanthology.org/W18-5413.pdf
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