Humanizing Machines: Rethinking LLM Anthropomorphism Through a Multi-Level Framework of Design

Yunze Xiao, Lynnette Hui Xian Ng, Jiarui Liu, Mona T. Diab


Abstract
Large Language Models (LLMs) increasingly exhibit anthropomorphism characteristics – human-like qualities portrayed across their outlook, language, behavior, and reasoning functions. Such characteristics enable more intuitive and engaging human-AI interactions. However, current research on anthropomorphism remains predominantly risk-focused, emphasizing over-trust and user deception while offering limited design guidance. We argue that anthropomorphism should instead be treated as a concept of design that can be intentionally tuned to support user goals. Drawing from multiple disciplines, we propose that the anthropomorphism of an LLM-based artifact should reflect the interaction between artifact designers and interpreters. This interaction is facilitated by cues embedded in the artifact by the designers and the (cognitive) responses of the interpreters to the cues. Cues are categorized into four dimensions: perceptive, linguistic, behavioral, and cognitive. By analyzing the manifestation and effectiveness of each cue, we provide a unified taxonomy with actionable levers for practitioners. Consequently, we advocate for function-oriented evaluations of anthropomorphic design.
Anthology ID:
2025.emnlp-main.164
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:
3331–3350
Language:
URL:
https://preview.aclanthology.org/ingest-emnlp/2025.emnlp-main.164/
DOI:
Bibkey:
Cite (ACL):
Yunze Xiao, Lynnette Hui Xian Ng, Jiarui Liu, and Mona T. Diab. 2025. Humanizing Machines: Rethinking LLM Anthropomorphism Through a Multi-Level Framework of Design. In Proceedings of the 2025 Conference on Empirical Methods in Natural Language Processing, pages 3331–3350, Suzhou, China. Association for Computational Linguistics.
Cite (Informal):
Humanizing Machines: Rethinking LLM Anthropomorphism Through a Multi-Level Framework of Design (Xiao et al., EMNLP 2025)
Copy Citation:
PDF:
https://preview.aclanthology.org/ingest-emnlp/2025.emnlp-main.164.pdf
Checklist:
 2025.emnlp-main.164.checklist.pdf