CIE: Controlling Language Model Text Generations Using Continuous Signals

Vinay Samuel, Harshita Diddee, Yiming Zhang, Daphne Ippolito


Abstract
Aligning language models (LMs) with user intent is becoming increasingly relevant to enhance user experience.This calls for designing methods that can allow users to control the properties of the language that LMs generate, for example, controlling the length of the generation or the complexity of the language that gets chosen.Most existing work attempts to integrate users’ control by conditioning LM generations on natural language prompts or discrete control signals, which are often brittle and hard to scale.In this work, we are interested in continuous control signals, ones that exist along a spectrum that can’t easily be captured in a natural language prompt or via existing techniques in conditional generation.Through a case study in controlling the precise response-length of generations, we demonstrate how an LM can be finetuned to expect a control vector that is interpolated between a “low” and a “high” token embedding.Our method more reliably exerts response-length control than in-context learning methods or fine-tuning methods that represent the control signal as a discrete signal.
Anthology ID:
2025.emnlp-main.189
Volume:
Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing
Month:
November
Year:
2025
Address:
Suzhou, China
Editors:
Christos Christodoulopoulos, Tanmoy Chakraborty, Carolyn Rose, Violet Peng
Venue:
EMNLP
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
3815–3825
Language:
URL:
https://preview.aclanthology.org/ingest-emnlp/2025.emnlp-main.189/
DOI:
Bibkey:
Cite (ACL):
Vinay Samuel, Harshita Diddee, Yiming Zhang, and Daphne Ippolito. 2025. CIE: Controlling Language Model Text Generations Using Continuous Signals. In Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing, pages 3815–3825, Suzhou, China. Association for Computational Linguistics.
Cite (Informal):
CIE: Controlling Language Model Text Generations Using Continuous Signals (Samuel et al., EMNLP 2025)
Copy Citation:
PDF:
https://preview.aclanthology.org/ingest-emnlp/2025.emnlp-main.189.pdf
Checklist:
 2025.emnlp-main.189.checklist.pdf