Cited by 32Topic ModelingDomain Adaptation and Few-Shot LearningNatural Language Processing Techniques

Large Language Models Can be Lazy Learners: Analyze Shortcuts in In-Context Learning

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Tang, Ruixiang, Kong, Dehan, Huang, Longtao, Xue, Hui·2023·Findings of the Association for Computational Linguistics: ACL 2023

Abstract

Large language models (LLMs) have recently shown great potential for in-context learning, where LLMs learn a new task simply by conditioning on a few input-label pairs (prompts).Despite their potential, our understanding of the factors influencing end-task performance and the robustness of in-context learning remains limited.This paper aims to bridge this knowledge gap by investigating the reliance of LLMs on shortcuts or spurious correlations within prompts.Through comprehensive experiments on classification and extraction tasks, we reveal that LLMs are "lazy learners" that tend to exploit shortcuts in prompts for downstream tasks.Additionally, we uncover a surprising finding that larger models are more likely to utilize shortcuts in prompts during inference.Our findings provide a new perspective on evaluating robustness in in-context learning and pose new challenges for detecting and mitigating the use of shortcuts in prompts.

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  • The shortcut learning problem has been observed in various natural language understanding tasks under the pretraining and fine-tuning paradigm, where models heavily rely on spurious correlations between input and labels in the fine-tuning data for prediction.

    “The shortcut learning problem has been observed in various natural language understanding tasks under the pretraining and fine-tuning paradigm, where models heavily rely on spurious correlations between input and labels in the fine-tuning data for prediction [35,39,107,109,128,129].”

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Authors
Tang, R., Kong, D., Huang, L., & Xue, H.
Affiliations
Alibaba Group (China) (CN)
Venue
Findings of the Association for Computational Linguistics: ACL 2023
Published
2023
Pages
4645-4657
OpenAlex
W4385569978
Cited by
31
References
40
Citations by year
2026: 6 · 2025: 13 · 2024: 8 · 2023: 4
FWCI
5.49
Type
conference paper
Language
en
Open access
Licence
cc-by
Locations
  • Findings of the Association for Computational Linguistics: ACL (Findings of ACL) (publishedVersion, cc-by)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Computer Science › Artificial Intelligence › Topic Modeling
  • Physical Sciences › Computer Science › Artificial Intelligence › Domain Adaptation and Few-Shot Learning
  • Physical Sciences › Computer Science › Artificial Intelligence › Natural Language Processing Techniques
Keywords
in-context learning, large language models, shortcuts, spurious correlations, lazy learning, prompt learning, robustness, model size, classification, information extraction

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