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arXiv 2402.02680cs.CLcs.AIcs.CYcs.LG
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大语言模型存在地理偏见

Large Language Models are Geographically Biased

Stanford University(斯坦福大学)

Rohin Manvi, Samar Khanna, Marshall Burke, David Lobell, Stefano Ermon

AI总结:

该研究从地理学视角探究大语言模型的地理偏见,发现模型虽能做出高相关性的零样本地理空间预测,但对低社会经济地区存在明显主观偏见,还提出偏见评分量化方法,揭示不同模型偏见程度差异显著。

摘要:

大语言模型(LLMs)固有地携带其训练语料中包含的偏见,这可能导致社会危害的延续。随着这些基础模型的影响力日益增长,理解和评估其偏见对于实现公平性和准确性变得至关重要。我们提出通过地理学视角来研究大语言模型对我们所生活世界的认知。由于人类生活的诸多方面(如文化、种族、语言、政治和宗教)都能有意义地投射到地理空间上且存在真实基准,这种方法尤为有效。我们展示了多种存在问题的地理偏见,我们将其定义为地理空间预测中的系统性误差。首先,我们证明大语言模型能够以评分形式做出准确的零样本地理空间预测,这些评分与真实基准呈现出强单调相关性(斯皮尔曼ρ系数最高达0.89)。随后我们发现,大语言模型在一系列客观和主观主题上都表现出常见偏见。特别是,大语言模型在吸引力、道德和智力等多种敏感主观主题上,明显对社会经济条件较差的地区(例如非洲大部分地区)存在偏见(斯皮尔曼ρ系数最高达0.70)。最后,我们引入了一种偏见评分来量化这一现象,并发现在现有大语言模型中,偏见程度存在显著差异。代码可在项目网站获取:https://rohinmanvi.github.io/GeoLLM

英文摘要:

Large Language Models (LLMs) inherently carry the biases contained in their training corpora, which can lead to the perpetuation of societal harm. As the impact of these foundation models grows, understanding and evaluating their biases becomes crucial to achieving fairness and accuracy. We propose to study what LLMs know about the world we live in through the lens of geography. This approach is particularly powerful as there is ground truth for the numerous aspects of human life that are meaningfully projected onto geographic space such as culture, race, language, politics, and religion. We show various problematic geographic biases, which we define as systemic errors in geospatial predictions. Initially, we demonstrate that LLMs are capable of making accurate zero-shot geospatial predictions in the form of ratings that show strong monotonic correlation with ground truth (Spearman's $ρ$ of up to 0.89). We then show that LLMs exhibit common biases across a range of objective and subjective topics. In particular, LLMs are clearly biased against locations with lower socioeconomic conditions (e.g. most of Africa) on a variety of sensitive subjective topics such as attractiveness, morality, and intelligence (Spearman's $ρ$ of up to 0.70). Finally, we introduce a bias score to quantify this and find that there is significant variation in the magnitude of bias across existing LLMs. Code is available on the project website: https://rohinmanvi.github.io/GeoLLM

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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