Language Models as Agent Models

Jacob Andreas


Abstract
Language models (LMs) are trained on collections of documents, written by individual human agents to achieve specific goals in the outside world. During training, LMs have access only to text of these documents, with no direct evidence of the internal states of the agents that produced them—a fact often used to argue that LMs are incapable of modeling goal-directed aspects of human language production and comprehension. Can LMs trained on text learn anything at all about the relationship between language and use? I argue that LMs are models of communicative intentions in a specific, narrow sense. When performing next word prediction given a textual context, an LM can infer and represent properties of an agent likely to have produced that context. These representations can in turn influence subsequent LM generation in the same way that agents’ communicative intentions influence their language. I survey findings from the recent literature showing that—even in today’s non-robust and error-prone models—LMs infer and use representations of fine-grained communicative intentions and high-level beliefs and goals. Despite the limited nature of their training data, they can thus serve as building blocks for systems that communicate and act intentionally.
Anthology ID:
2022.findings-emnlp.423
Volume:
Findings of the Association for Computational Linguistics: EMNLP 2022
Month:
December
Year:
2022
Address:
Abu Dhabi, United Arab Emirates
Editors:
Yoav Goldberg, Zornitsa Kozareva, Yue Zhang
Venue:
Findings
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
5769–5779
Language:
URL:
https://aclanthology.org/2022.findings-emnlp.423
DOI:
10.18653/v1/2022.findings-emnlp.423
Bibkey:
Cite (ACL):
Jacob Andreas. 2022. Language Models as Agent Models. In Findings of the Association for Computational Linguistics: EMNLP 2022, pages 5769–5779, Abu Dhabi, United Arab Emirates. Association for Computational Linguistics.
Cite (Informal):
Language Models as Agent Models (Andreas, Findings 2022)
Copy Citation:
PDF:
https://aclanthology.org/2022.findings-emnlp.423.pdf