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Assessing Bias in Human Decision-Making

A new method to measure biases in decisions without clear standards.

Wanxue Dong, Maria De-arteaga, Maytal Saar-Tsechansky

― 6 min read


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Bias in human decision-making can lead to unfair treatment of people and create problems for organizations and society. Many times, organizations try to fix this issue by creating different programs to reduce biases. However, measuring how biased Decisions really are is tricky because there isn't always a clear answer on what the right decision should be.

In this piece, we present a straightforward method to look at biases in human decisions even when we don’t have a clear standard to compare against. Our method uses machine learning techniques to assess these biases, and we back it up with solid evidence showing it works better than other common methods.

The Problem of Bias

When people make decisions, biases can sneak in. For example, doctors might make different choices for patients based on their race or gender, leading to unequal Healthcare. Similarly, employers might favor candidates of a particular race over equally qualified candidates from another race, which is known as bias in Hiring practices.

Even in the realm of Crowdsourcing, where many people contribute their opinions or ratings, biases can distort the outcome. It’s often hard to tell how these biases affect different groups of people because there isn't always a "gold standard," or a way to know what the correct decision should have been.

Many tools exist to try to identify and fix bias, but most of them fall short because they don't consider the quality of the decisions. For instance, some metrics look at how many people from different groups are hired for a job without considering if those hired are the best candidates for the role. Just because a certain number of candidates are interviewed doesn’t mean they are the right fit.

A New Way to Assess Bias

To tackle this problem, we've developed a method that uses past decisions made by humans, coupled with a small number of gold standard decisions, to assess biases accurately. The idea is simple: by comparing human decisions to a gold standard of what the decision should have been, we can measure how much bias exists.

This method is designed to be flexible, so it can be used in many different fields, including healthcare and hiring. We also make sure to validate our method with real-world data to show that it consistently performs better than older methods.

Real-Life Examples of Bias

Let’s consider a few real-life scenarios to highlight these biases.

Healthcare Bias

In healthcare, patients from minority groups often receive a lower quality of care compared to others. For example, a doctor may prescribe a certain treatment to a white patient but not the same treatment to a black patient, even if they have a similar condition. This unequal treatment leads to significant health disparities that can affect the well-being of entire communities.

Hiring Bias

When it comes to hiring, many studies show that resumes with names that sound “ethnic” face bias compared to those with more common names. Even if two candidates have the same qualifications, the one with the “ethnic” name might get fewer callbacks for interviews because of an unconscious bias.

Crowdsourcing Bias

In the world of online reviews and crowdsourced information, biases can also appear. For example, in a crowd of reviewers, certain groups might not express their opinions as openly, which skews the overall ratings either positively or negatively.

How We Measure Bias

Our approach starts by looking at a group of human decision-makers. This could be doctors, hiring managers, or anyone making decisions based on human judgment. Each decision-maker has a history of decisions that we can analyze. We introduce a step that involves checking a small set of decisions that come from a gold standard to see how they compare to what each decision-maker did.

By focusing on errors like false positives or false negatives in these decisions across groups, we can see where biases exist. For instance, if one group has significantly more false positives than another, we can say there is a bias in that decision-making process.

Benefits of Our Method

Our method offers several advantages:

  1. Flexibility: It can be applied to various fields and decision-making scenarios.
  2. Simplicity: It uses historical data and a small number of gold standard labels, making it easy to implement.
  3. Better Decision Making: It helps identify biases before they become problematic, allowing organizations to take proactive steps.

By providing a clearer understanding of biases, organizations can make better decisions in hiring, healthcare, and much more.

Proving Our Method Works

To validate our approach, we conducted several tests and evaluations. We compared our method against existing methods to see how it performed. The results were promising; our method often provided better insights into human bias and produced more useful assessments.

For example, we tested our method using various datasets related to income, credit, and hospital readmission rates. In nearly all cases, we found that our method substantially outperformed other techniques. The feedback was clear: organizations can benefit from using our method to assess bias.

Conclusion and Future Directions

In summary, our method for assessing human bias is not only innovative but practical. It allows organizations to get a clearer picture of how bias affects their decision-making processes.

As we look to the future, there are exciting possibilities for expanding this work. We can explore ways to integrate assessments of bias into other areas of research, develop better training materials for decision-makers, and ensure that organizations can train their algorithms without embedding human bias.

Ultimately, our goal is to help create a fairer society by making human decisions more transparent and accountable. This will not only improve outcomes for individuals but will also enhance overall trust in institutions and processes that serve the public.

By continuing to refine our approach and exploring its applications, we can hopefully contribute to meaningful changes in how organizations view and tackle bias.

Let’s think of it this way: if we can train machines to learn from their mistakes, maybe we can also help humans do the same. After all, everyone makes mistakes, but it’s how we learn from them that truly counts!

Original Source

Title: Using Machine Bias To Measure Human Bias

Abstract: Biased human decisions have consequential impacts across various domains, yielding unfair treatment of individuals and resulting in suboptimal outcomes for organizations and society. In recognition of this fact, organizations regularly design and deploy interventions aimed at mitigating these biases. However, measuring human decision biases remains an important but elusive task. Organizations are frequently concerned with mistaken decisions disproportionately affecting one group. In practice, however, this is typically not possible to assess due to the scarcity of a gold standard: a label that indicates what the correct decision would have been. In this work, we propose a machine learning-based framework to assess bias in human-generated decisions when gold standard labels are scarce. We provide theoretical guarantees and empirical evidence demonstrating the superiority of our method over existing alternatives. This proposed methodology establishes a foundation for transparency in human decision-making, carrying substantial implications for managerial duties, and offering potential for alleviating algorithmic biases when human decisions are used as labels to train algorithms.

Authors: Wanxue Dong, Maria De-arteaga, Maytal Saar-Tsechansky

Last Update: 2024-12-10 00:00:00

Language: English

Source URL: https://arxiv.org/abs/2411.18122

Source PDF: https://arxiv.org/pdf/2411.18122

Licence: https://creativecommons.org/licenses/by-nc-sa/4.0/

Changes: This summary was created with assistance from AI and may have inaccuracies. For accurate information, please refer to the original source documents linked here.

Thank you to arxiv for use of its open access interoperability.

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