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Cited by 8Ethics and Social Impacts of AIPsychology of Moral and Emotional JudgmentEthics in Business and Education

The DOI matches its Crossref record; 54 of the 54 references it cites were found in a registry or an index.

The Fragility of Moral Judgment in Large Language Models

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van Nuenen, Tom, Sachdeva, Pratik Singh·2026·Proceedings of the 2026 ACM Conference on Fairness, Accountability, and Transparency

Abstract

People increasingly use large language models (LLMs) for everyday moral and interpersonal guidance, yet these systems judge dilemmas as presented. We introduce a perturbation framework for testing the stability and manipulability of LLM moral judgments while holding the underlying moral conflict constant. Using 2,939 dilemmas from r/AmItheAsshole (January–March 2025), we generate three families of content perturbations—surface edits (lexical/structural noise), point-of-view shifts (voice and stance neutralization), and persuasion cues (minimal self-positioning, social proof, pattern admissions, victim framing). We additionally vary the evaluation instructions via protocol perturbations (ordering of model outputs, placement of task instructions, and an unstructured prompt without forced-choice scaffolding). We evaluated all scenario variants with four models (GPT-4.1, Claude 3.7 Sonnet, DeepSeek V3, Qwen2.5-72B) (N = 129,156 judgments). We estimated the self-consistency of models via test–retest (3 runs) and sampling-based normalized entropy.

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Research works printed but not linked: 6

  1. 10.1145/3715318.3715327 · DOI
  2. Igor Knez and Olle Nordhall. 2017. A Comparison of Guilt and Shame as Moral Motivators in Decision-making. Journal of Environmental Psychology 52 (2017), 23–31.
  3. Lorenz Kuhn Yarin Gal and Sebastian Farquhar. 2023. Semantic Uncertainty: Linguistic Invariances for Uncertainty Estimation in Natural Language Generation. In The Eleventh International Conference on Learning Representations. OpenReview.net Kigali Rwanda. ICLR 2023.
  4. Melanie Sclar, Yejin Choi, Yulia Tsvetkov, and Alane Suhr. 2024. Quantifying Language Models' Sensitivity to Spurious Features in Prompt Design or: How I Learned to Start Worrying about Prompt Formatting. In The Twelfth International Conference on Learning Representations. OpenReview.net, Vienna, Austria. ICLR 2024.
  5. Lukasz Walasek and Neil Stewart. 2015. A Meta-analytic Review of Valence Framing Effects in Moral Decision-making. Judgment and Decision Making 10, 5 (2015), 449–458.
  6. Xuezhi Wang, Jason Wei, Dale Schuurmans, Quoc V. Le, Ed H. Chi, Sharan Narang, Aakanksha Chowdhery, and Denny Zhou. 2023. Self-Consistency Improves Chain of Thought Reasoning in Language Models. In The Eleventh International Conference on Learning Representations. OpenReview.net, Kigali, Rwanda. ICLR 2023.

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Metadata

Authors
van Nuenen, T., & Sachdeva, P. S.
Affiliations
University of California, Berkeley (US)
Venue
Proceedings of the 2026 ACM Conference on Fairness, Accountability, and Transparency
Publisher
ACM
Published
2026-06-25
Pages
7327-7372
OpenAlex
W7166549171
Cited by
8
References
43
Citations by year
2026: 8
FWCI
10.58
Type
conference paper
Language
en
Open access
Locations
  • ACM Conference on Fairness, Accountability, and Transparency (FAccT) (publishedVersion, cc-by)
  • arXiv (Cornell University) (submittedVersion, cc-by)
  • arXiv (Cornell University) (cc-by)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Ethics and Social Impacts of AI
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Psychology of Moral and Emotional Judgment
  • Social Sciences › Business, Management and Accounting › Organizational Behavior and Human Resource Management › Ethics in Business and Education
Keywords
large language models, moral judgment, ethical dilemmas, test-retest stability, self-consistency

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CoChat. (2026). Citation check: The Fragility of Moral Judgment in Large Language Models. https://app.cochat.ai/papers/10.1145/3805689.3806447
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van Nuenen, T., & Sachdeva, P. S. (2026). The Fragility of Moral Judgment in Large Language Models. Proceedings of the 2026 ACM Conference on Fairness, Accountability, and Transparency. https://doi.org/10.1145/3805689.3806447

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