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Despite numerous efforts to mitigate their biases, ML systems continue to harm already-marginalized people. While predominant ML approaches assume bias can be removed and fair models can be created, we show that these are not always…

Computation and Language · Computer Science 2025-04-02 Lucy Havens , Benjamin Bach , Melissa Terras , Beatrice Alex

Machine learning models are central to people's lives and impact society in ways as fundamental as determining how people access information. The gravity of these models imparts a responsibility to model developers to ensure that they are…

Applications · Statistics 2020-07-13 Cyrus DiCiccio , Sriram Vasudevan , Kinjal Basu , Krishnaram Kenthapadi , Deepak Agarwal

Machine learning based systems are reaching society at large and in many aspects of everyday life. This phenomenon has been accompanied by concerns about the ethical issues that may arise from the adoption of these technologies. ML fairness…

Machine Learning · Computer Science 2021-01-01 Luca Oneto , Silvia Chiappa

Biases in machine learning pose significant challenges, particularly when models amplify disparities that affect disadvantaged groups. Traditional bias mitigation techniques often lead to a {\itshape leveling-down effect}, whereby improving…

Machine Learning · Computer Science 2025-09-03 Lucas Mansilla , Rodrigo Echeveste , Camila Gonzalez , Diego H. Milone , Enzo Ferrante

Machine learning actively impacts our everyday life in almost all endeavors and domains such as healthcare, finance, and energy. As our dependence on the machine learning increases, it is inevitable that these algorithms will be used to…

Machine Learning · Computer Science 2021-02-23 Ankit Kulshrestha , Ilya Safro

There are several bias mitigators that can reduce algorithmic bias in machine learning models but, unfortunately, the effect of mitigators on fairness is often not stable when measured across different data splits. A popular approach to…

Machine Learning · Computer Science 2022-02-03 Michael Feffer , Martin Hirzel , Samuel C. Hoffman , Kiran Kate , Parikshit Ram , Avraham Shinnar

Recommender systems continually retrain on user reactions to their own predictions, creating AI feedback loops that amplify biases and diminish fairness over time. Despite this well-known risk, most bias mitigation techniques are tested…

Information Retrieval · Computer Science 2025-09-03 Theodor Stoecker , Samed Bayer , Ingo Weber

Existing studies on bias mitigation methods for large language models (LLMs) use diverse baselines and metrics to evaluate debiasing performance, leading to inconsistent comparisons among them. Moreover, their evaluations are mostly based…

Computation and Language · Computer Science 2026-02-17 Xin Xu , Xunzhi He , Churan Zhi , Ruizhe Chen , Julian McAuley , Zexue He

Bias is known to be an impediment to fair decisions in many domains such as human resources, the public sector, health care etc. Recently, hope has been expressed that the use of machine learning methods for taking such decisions would…

Machine Learning · Computer Science 2019-09-05 Jindong Gu , Daniela Oelke

This paper clarifies why bias cannot be completely mitigated in Machine Learning (ML) and proposes an end-to-end methodology to translate the ethical principle of justice and fairness into the practice of ML development as an ongoing…

Computers and Society · Computer Science 2023-04-14 Georgina Curto , Flavio Comim

As methods to create discrimination-aware models develop, they focus on centralized ML, leaving federated learning (FL) unexplored. FL is a rising approach for collaborative ML, in which an aggregator orchestrates multiple parties to train…

Machine Learning · Computer Science 2020-12-07 Annie Abay , Yi Zhou , Nathalie Baracaldo , Shashank Rajamoni , Ebube Chuba , Heiko Ludwig

Fairness is a critical requirement for human-related, high-stakes software systems, motivating extensive research on bias mitigation. Prior work has largely focused on tabular data settings using traditional Machine Learning (ML) methods.…

Software Engineering · Computer Science 2026-04-15 Xinyue Li , Sixuan Li , Ying Xiao , Jie M. Zhang , Zhou Yang , Xuanzhe Liu , Zhenpeng Chen

Machine learning's widespread adoption in decision-making processes raises concerns about fairness, particularly regarding the treatment of sensitive features and potential discrimination against minorities. The software engineering…

Applications of machine learning (ML) to high-stakes policy settings -- such as education, criminal justice, healthcare, and social service delivery -- have grown rapidly in recent years, sparking important conversations about how to ensure…

Machine Learning · Computer Science 2021-05-14 Hemank Lamba , Kit T. Rodolfa , Rayid Ghani

Machine Learning (ML) models have gained popularity in medical imaging analysis given their expert level performance in many medical domains. To enhance the trustworthiness, acceptance, and regulatory compliance of medical imaging models…

Human-Computer Interaction · Computer Science 2025-06-06 Mischa Dombrowski , Andrea Prenner , Bernhard Kainz

Over the past 15 years, hundreds of bias mitigation methods have been proposed in the pursuit of fairness in machine learning (ML). However, algorithmic biases are domain-, task-, and model-specific, leading to a `portability trap': bias…

Machine Learning · Computer Science 2025-05-29 MaryBeth Defrance , Guillaume Bied , Maarten Buyl , Jefrey Lijffijt , Tijl De Bie

Data collected in the real world often encapsulates historical discrimination against disadvantaged groups and individuals. Existing fair machine learning (FairML) research has predominantly focused on mitigating discriminative bias in the…

Machine Learning · Computer Science 2024-06-19 Zhining Liu , Ruizhong Qiu , Zhichen Zeng , Yada Zhu , Hendrik Hamann , Hanghang Tong

Large Language Models(LLMs) have revolutionized various applications in natural language processing (NLP) by providing unprecedented text generation, translation, and comprehension capabilities. However, their widespread deployment has…

Computation and Language · Computer Science 2024-09-26 Rajesh Ranjan , Shailja Gupta , Surya Narayan Singh

Large Language Models (LLMs) have revolutionized natural language processing, but their susceptibility to biases poses significant challenges. This comprehensive review examines the landscape of bias in LLMs, from its origins to current…

Computation and Language · Computer Science 2026-05-04 Yufei Guo , Muzhe Guo , Juntao Su , Zhou Yang , Mengqiu Zhu , Hongfei Li , Mengyang Qiu , Shuo Shuo Liu

Machine Learning (ML) systems are increasingly used to support decision-making processes that affect individuals. However, these systems often rely on biased data, which can lead to unfair outcomes against specific groups. With the growing…

Machine Learning · Computer Science 2026-04-14 Joana Simões , João Correia