Men Also Do Laundry: Multi-Attribute Bias Amplification

TL;DR

This paper introduces a new metric for measuring bias amplification in computer vision models across multiple attributes, revealing that existing metrics may underestimate bias and providing a tool for better bias assessment and mitigation.

Contribution

The paper proposes a novel Multi-Attribute Bias Amplification metric that captures complex biases across multiple attributes, improving upon existing single-attribute metrics.

Findings

Models exploit multi-attribute correlations not captured by current metrics.

Existing metrics can underestimate bias amplification.

Benchmarking shows potential for bias mitigation methods.

Abstract

As computer vision systems become more widely deployed, there is increasing concern from both the research community and the public that these systems are not only reproducing but amplifying harmful social biases. The phenomenon of bias amplification, which is the focus of this work, refers to models amplifying inherent training set biases at test time. Existing metrics measure bias amplification with respect to single annotated attributes (e.g., $\texttt{computer}$). However, several visual datasets consist of images with multiple attribute annotations. We show models can learn to exploit correlations with respect to multiple attributes (e.g., {$\texttt{computer}$, $\texttt{keyboard}$}), which are not accounted for by current metrics. In addition, we show current metrics can give the erroneous impression that minimal or no bias amplification has occurred as they involve aggregating over positive and negative values. Further, these metrics lack a clear desired value, making them difficult to interpret. To address these shortcomings, we propose a new metric: Multi-Attribute Bias Amplification. We validate our proposed metric through an analysis of gender bias amplification on the COCO and imSitu datasets. Finally, we benchmark bias mitigation methods using our proposed metric, suggesting possible avenues for future bias mitigation