Entangled in Representations: Mechanistic Investigation of Cultural Biases in Large Language Models

• URL: http://arxiv.org/abs/2508.08879v1
• Date: Tue, 12 Aug 2025 12:05:32 GMT
• Title: Entangled in Representations: Mechanistic Investigation of Cultural Biases in Large Language Models
• Authors: Haeun Yu, Seogyeong Jeong, Siddhesh Pawar, Jisu Shin, Jiho Jin, Junho Myung, Alice Oh, Isabelle Augenstein,
• Abstract summary: We propose Culturescope, the first interpretability-based method that probes the internal representations of large language models.<n>We introduce a cultural flattening score as a measure of the intrinsic cultural biases.<n>Our experimental results reveal that LLMs encode Western-dominance bias and cultural flattening in their cultural knowledge space.
• Score: 42.367959511140036
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The growing deployment of large language models (LLMs) across diverse cultural contexts necessitates a better understanding of how the overgeneralization of less documented cultures within LLMs' representations impacts their cultural understanding. Prior work only performs extrinsic evaluation of LLMs' cultural competence, without accounting for how LLMs' internal mechanisms lead to cultural (mis)representation. To bridge this gap, we propose Culturescope, the first mechanistic interpretability-based method that probes the internal representations of LLMs to elicit the underlying cultural knowledge space. CultureScope utilizes a patching method to extract the cultural knowledge. We introduce a cultural flattening score as a measure of the intrinsic cultural biases. Additionally, we study how LLMs internalize Western-dominance bias and cultural flattening, which allows us to trace how cultural biases emerge within LLMs. Our experimental results reveal that LLMs encode Western-dominance bias and cultural flattening in their cultural knowledge space. We find that low-resource cultures are less susceptible to cultural biases, likely due to their limited training resources. Our work provides a foundation for future research on mitigating cultural biases and enhancing LLMs' cultural understanding. Our codes and data used for experiments are publicly available.

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