Energy-Based Transformers as Predictors of Reading Difficulty

Jakub Dotlacil, Ece Takmaz


Abstract
Transformer language models have become established tools for modeling human sentence processing, with measures such as surprisal and attention entropy serving as effective predictors of reading difficulty that together capture complementary aspects of processing load. Here, we explore a related class of transformer models: energy-based transformers, which provide a principled formal link to associative memory models, bringing processing research into direct contact with the broader literature on Hopfield networks and dense associative memory. To our knowledge, this is the first exploration of an energy-based transformer measure in computational psycholinguistics. Across reading-time corpora (Natural Stories, UCL eye-tracking, UCL self-paced reading), the energy measure is a robust predictor of reading times, providing significant fit beyond surprisal and entropy in all three. In a controlled experiment on relative clause processing, energy at a single layer captures the well-known object/subject asymmetry. We find evidence that it subsumes effects attributable to both attention entropy and surprisal, suggesting that energy may serve as a single unified predictor where multiple complementary measures have previously been required.
Anthology ID:
2026.emnlp-main.1721
Volume:
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
39262–39278
Language:
URL:
https://aclanthology.org/2026.emnlp-main.1721/
DOI:
Bibkey:
Cite (ACL):
Jakub Dotlacil and Ece Takmaz. 2026. Energy-Based Transformers as Predictors of Reading Difficulty. In Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing, pages 39262–39278, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
Energy-Based Transformers as Predictors of Reading Difficulty (Dotlacil & Takmaz, EMNLP 2026)
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PDF:
https://aclanthology.org/2026.emnlp-main.1721.pdf