Recurrent Neural Network Language Models Always Learn English-Like Relative Clause Attachment

Forrest Davis, Marten van Schijndel


Abstract
A standard approach to evaluating language models analyzes how models assign probabilities to valid versus invalid syntactic constructions (i.e. is a grammatical sentence more probable than an ungrammatical sentence). Our work uses ambiguous relative clause attachment to extend such evaluations to cases of multiple simultaneous valid interpretations, where stark grammaticality differences are absent. We compare model performance in English and Spanish to show that non-linguistic biases in RNN LMs advantageously overlap with syntactic structure in English but not Spanish. Thus, English models may appear to acquire human-like syntactic preferences, while models trained on Spanish fail to acquire comparable human-like preferences. We conclude by relating these results to broader concerns about the relationship between comprehension (i.e. typical language model use cases) and production (which generates the training data for language models), suggesting that necessary linguistic biases are not present in the training signal at all.
Anthology ID:
2020.acl-main.179
Volume:
Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics
Month:
July
Year:
2020
Address:
Online
Editors:
Dan Jurafsky, Joyce Chai, Natalie Schluter, Joel Tetreault
Venue:
ACL
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
1979–1990
Language:
URL:
https://aclanthology.org/2020.acl-main.179
DOI:
10.18653/v1/2020.acl-main.179
Bibkey:
Cite (ACL):
Forrest Davis and Marten van Schijndel. 2020. Recurrent Neural Network Language Models Always Learn English-Like Relative Clause Attachment. In Proceedings of the 58th Annual Meeting of the Association for Computational Linguistics, pages 1979–1990, Online. Association for Computational Linguistics.
Cite (Informal):
Recurrent Neural Network Language Models Always Learn English-Like Relative Clause Attachment (Davis & van Schijndel, ACL 2020)
Copy Citation:
PDF:
https://aclanthology.org/2020.acl-main.179.pdf
Video:
 http://slideslive.com/38929008
Code
 forrestdavis/AmbiAttach