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RENATA: REpreseNtation And Training Alteration for Bias Mitigation

2020-12-11 14:39:10
William Paul, Armin Hadzic, Neil Joshi, Phil Burlina

Abstract

We propose a novel method for enforcing AI fairness with respect to protected or sensitive factors. This method uses a dual strategy performing Training And Representation Alteration (RENATA) for mitigation of two of the most prominent causes of AI bias, including: a) the use of representation learning alteration via adversarial independence, to suppress the bias-inducing dependence of the data representation from protected factors; and b) training set alteration via intelligent augmentation, to address bias-causing data imbalance, by using generative models that allow fine control of sensitive factors related to underrepresented populations. When testing our methods on image analytics, experiments demonstrate that RENATA significantly or fully debiases baseline models while outperforming competing debiasing methods, e.g., with (% overall accuracy, % accuracy gap) of (78.75, 0.5) vs. baseline method's (71.75, 10.5) for EyePACS, and (73.71, 11.82) vs. the (69.08, 21.65) baseline for CelebA. As an additional contribution, recognizing certain limitations in current metrics used for assessing debiasing performance, this study proposes novel conjunctive debiasing metrics. Our experiments also demonstrate the ability of these novel metrics in assessing the Pareto efficiency of the proposed methods.

Abstract (translated)

URL

https://arxiv.org/abs/2012.06387

PDF

https://arxiv.org/pdf/2012.06387.pdf


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