Every day, you make decisions using the information available to you. But your existing beliefs can influence what you notice, trust, and ultimately act on.
One reason is cognitive bias.
Whether you’re evaluating a job candidate, assessing a project’s performance, or considering a new business opportunity, cognitive biases can subtly influence your judgment. Confirmation bias, in particular, can shape how you gather and interpret information, reinforcing what you already believe instead of challenging your assumptions.
Understanding how confirmation bias works can help you recognize it in yourself and your team, consider different perspectives, and make more informed decisions.
What Is Confirmation Bias?
Confirmation bias is the tendency to favor information that supports what you already believe and discount information that challenges it. Evidence that aligns with your existing beliefs may feel easier to accept than data that call them into question.
Imagine you’ve spent months advocating for a new initiative. When early results arrive, admitting the project isn't performing as expected may require you to reconsider your judgment or defend a change in direction. Focusing on positive results instead can reinforce your original belief that the initiative will succeed.
Workplace dynamics can amplify that tendency. Hierarchy, group consensus, and established organizational assumptions can discourage employees from challenging a prevailing viewpoint.
The online course Management Essentials illustrates the danger of that dynamic. When employees have relevant information or doubts but don’t communicate them, managers lose visibility into the full situation. Effective managers create conversations that surface information early, ask questions that test assumptions, and make it easier for employees to raise concerns.
For managers, avoiding confirmation bias isn't just about changing how you think. It requires creating decision-making processes that make contradictory evidence easier to surface and consider.
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What Is an Example of Confirmation Bias in Business?
Consider a company exploring whether to launch a new product.
The CEO strongly believes there's demand for it and asks the marketing team to conduct research. Rather than starting with the question, “What does the market need?” the team begins with, “Will customers buy our product?”
That subtle difference can influence the entire research process.
The team may:
Ask survey questions that emphasize the product’s benefits
Pay greater attention to enthusiastic focus group participants
Interpret ambiguous feedback positively
Discount competitive data that threatens the business case
Emphasize data that supports leadership’s preferred outcome
By the end of the process, the company may have accumulated significant evidence supporting the launch. Yet, the data doesn't necessarily mean the original assumption was correct.
The team may have simply become better at confirming it.
Confirmation bias can appear in many other workplace situations, too. A manager who believes an employee is a top performer may interpret mistakes as exceptions while viewing another employee’s same mishaps as evidence of poor performance. A hiring manager who forms a strong first impression may spend the rest of an interview looking for reasons to validate it.
In each case, the problem isn't necessarily a lack of information. It’s how that information is sought and interpreted.
Why Is Confirmation Bias a Problem in the Workplace?
Confirmation bias can reduce the quality of your decisions by influencing which information you seek, trust, and prioritize.
If you primarily look for evidence that supports what you already believe, you can miss risks, alternatives, and opportunities that would otherwise influence your decision.
The effects can extend beyond a single choice. Confirmation bias can contribute to:
Poor hiring and promotion decisions
Ineffective performance evaluations
Misinterpretation of customer research
Failed product or strategic initiatives
Groupthink
Resistance to organizational change
It can also create a reinforcing cycle.
When managers repeatedly favor information that supports their views, employees may determine that challenging them isn't worthwhile. Over time, dissent decreases, leaving leaders with even less evidence that challenges their thinking.
This can create an information problem for leaders. As Harvard Business School Professor Joseph Fuller states in Management Essentials, “The challenge isn’t only what people say. The real danger is what never gets said at all.”
As Management Essentials illustrates, hierarchy, habit, or uncertainty can cause employees to hold back concerns, leaving managers with only fragments of the truth rather than the full picture.
Breaking that cycle requires managers to actively seek information that could prove them wrong.
How to Avoid Confirmation Bias in the Workplace
You can't eliminate every cognitive bias. You can, however, create processes that make it harder for confirmation bias to dictate your decisions. Here are five methods to consider.
1. Identify Your Assumptions
Before gathering information, write down what you currently believe.
For example:
Assumption: Customers aren't renewing because the product is too expensive.
Once you've identified the assumption, ask what other explanations could produce the same outcome.
Perhaps customers don't understand the product's value. Maybe a competitor has introduced a better alternative. Or perhaps the onboarding experience is too cumbersome and preventing prospects from signing up.
Recognizing an assumption as something to test can keep you from unconsciously treating your initial explanation as the answer.
2. Ask Neutral Questions
The questions you ask determine the information you receive.
Consider these two questions:
Leading: “Do you agree that our new onboarding process is easier to use?”
Neutral: “How would you describe your experience with our new onboarding process?”
The first encourages respondents to validate an assumption. The second leaves room for positive, negative, and unexpected feedback.
Before conducting interviews, surveys, or research, examine whether your questions assume a particular answer. When possible, ask someone who isn't invested in the outcome to review them.
3. Look for Disconfirming Evidence
Don't just ask, “What evidence supports my idea?” Instead, try, “What evidence would convince me that I'm wrong?”
Fuller offers another simple way to challenge your perspective in Management Essentials: “Here’s how I approached it. What am I not seeing?”
This shifts your goal from defending an idea to testing it.
For a product launch, that might mean identifying a minimum level of customer demand before investing further. When hiring, it could mean asking every candidate the same challenging questions rather than looking for additional reasons to hire the person you liked immediately.
4. Encourage Your Team to Challenge You
As a manager, saying that you welcome disagreement isn't always enough.
Hierarchy can make challenging a leader uncomfortable, particularly when the leader has already expressed a strong opinion.
That makes creating the right environment critical. As Fuller explains in Management Essentials, effective managers “ask questions that test assumptions” and “make it easier for people to raise concerns.”
Instead, explicitly invite alternative views. Ask questions such as:
What are we missing?
What assumptions are we making?
What would make this plan fail?
Who sees this differently?
Management Essentials highlights the value of an “opposer” in productive conversations—someone who challenges an idea or raises a risk.
“A healthy conversation needs opposers,” Fuller says in Management Essentials. “They test assumptions, expose blind spots, and keep groups from drifting into easy agreement.”
As a manager, your responsibility isn't to eliminate disagreement. It’s to create conditions where constructive conflict can improve the decision.
5. Avoid Reaching Consensus Too Quickly
Agreement can feel like evidence that you've made the right decision. But a group agreeing doesn't necessarily mean it has thoroughly evaluated its options.
This is particularly important when team members share similar experiences, or employees hesitate to challenge senior colleagues.
Before finalizing an important decision, ask whether your team has seriously considered competing explanations or alternatives—not merely discussed variations of the preferred idea.
How Confirmation Bias Can Affect Hiring
Hiring deserves special attention because it provides many opportunities for confirmation bias.
A hiring manager may form an impression within the first few minutes of an interview and then spend the remaining time looking for evidence that supports it.
For example, imagine two candidates give similarly vague answers about a past project. If you already favor one candidate, you might interpret their response as evidence of big-picture thinking while viewing the other candidate's answer as a lack of preparation.
A structured hiring process can help limit those inconsistencies.
Before interviews begin:
Establish the skills and criteria required for the role
Ask candidates the same core questions
Use a consistent evaluation system
Have multiple people independently assess candidates
Evaluate evidence before sharing overall impressions
The objective isn't to prove that your preferred candidate is right for the role. It’s to determine which candidate best meets the criteria you've established.
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Overcoming Confirmation Bias as a Manager
Confirmation bias is difficult to avoid because recognizing it requires questioning something you already believe.
Yet, effective management depends on being able to distinguish assumptions from evidence, surface conflicting perspectives, and adjust your judgment when new information emerges.
That doesn't mean treating every decision as an exhaustive debate. It means developing habits and processes that prevent your first idea from automatically becoming your final one.
It also requires creating an environment where employees can raise concerns without believing that agreement is the only acceptable response. As Management Essentials illustrates, managers can gain a fuller picture when conversations test assumptions and make it easier for important concerns to surface.
By asking neutral questions, seeking disconfirming evidence, inviting disagreement, and slowing down premature consensus, you can reduce the influence of confirmation bias and make more informed decisions.
Interested in strengthening your approach to management and decision-making? Explore Management Essentials—one of HBS Online’s leadership and management courses—and download our free e-book to begin building that foundation.
This post was updated on August 14, 2026. It was originally published on August 18, 2016.