Group fairness in case-based reasoning. Mitra, S., Mathew, D., P, D., & Chakraborti, S. In Case-Based Reasoning Research and Development - 31st International Conference, ICCBR 2023, Aberdeen, Scotland, July 17-20, 2023, Proceedings, volume 14141, of Lecture Notes in Computer Science, pages 217–232, 2023. Springer. doi abstract bibtex There has been a significant recent interest in algorithmic fairness within data-driven systems. In this paper, we consider group fairness within Case-based Reasoning. Group fairness targets to ensure parity of outcomes across pre-specified sensitive groups, defined on the basis of extant entrenched discrimination. Addressing the context of binary decision choice scenarios over binary sensitive attributes, we develop three separate fairness interventions that operate at different stages of the CBR process. These techniques, called Label Flipping (LF), Case Weighting (CW) and Weighted Adaptation (WA), use distinct strategies to enhance group fairness in CBR decision making. Through an extensive empirical evaluation over several popular datasets and against natural baseline methods, we show that our methods are able to achieve significant enhancements in fairness at low detriment to accuracy, thus illustrating effectiveness of our methods at advancing fairness.
@inproceedings{MitraEtAl2023,
author = {Mitra, Shania and Mathew, Ditty and P, Deepak and Chakraborti, Sutanu},
title = {{Group fairness in case-based reasoning}},
booktitle = {Case-Based Reasoning Research and Development - 31st International Conference, {ICCBR} 2023, Aberdeen, Scotland, July 17-20, 2023, Proceedings},
series = {Lecture Notes in Computer Science},
volume = {14141},
pages = {217--232},
publisher = {Springer},
year = {2023},
doi = {10.1007/978-3-031-40177-0_14},
abstract = {There has been a significant recent interest in algorithmic fairness within data-driven systems. In this paper, we consider group fairness within Case-based Reasoning. Group fairness targets to ensure parity of outcomes across pre-specified sensitive groups, defined on the basis of extant entrenched discrimination. Addressing the context of binary decision choice scenarios over binary sensitive attributes, we develop three separate fairness interventions that operate at different stages of the CBR process. These techniques, called Label Flipping (LF), Case Weighting (CW) and Weighted Adaptation (WA), use distinct strategies to enhance group fairness in CBR decision making. Through an extensive empirical evaluation over several popular datasets and against natural baseline methods, we show that our methods are able to achieve significant enhancements in fairness at low detriment to accuracy, thus illustrating effectiveness of our methods at advancing fairness.},
}
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