Anchoring Bias
A cognitive bias where the first piece of information encountered (the anchor) disproportionately influences subsequent judgments and decisions, even when the anchor is arbitrary or irrelevant to the decision at hand.
- What Is Anchoring Bias?
- How Anchoring Bias Works in the Brain
- Anchoring Bias in Compensation Decisions
- Anchoring Bias in Hiring and Interviews
- Anchoring Bias in Performance Management
- Anchoring Bias Research and Data
- How to Reduce Anchoring Bias in HR Decisions
- Frequently Asked Questions About Anchoring Bias
What Is Anchoring Bias?
Key Takeaways
- ✓Anchoring bias means the first piece of information you hear sets a reference point that shapes everything that follows, even when that information is irrelevant or arbitrary.
- ✓In HR, it's most dangerous in salary negotiations, performance calibrations, and interview scoring, anywhere a number or first impression sets the tone for decisions.
- ✓Research shows that even when people know they're being anchored, they can't fully adjust away from the anchor. The effect persists in trained professionals.
- ✓Salary history bans in 42% of US states exist specifically to combat anchoring bias in compensation decisions.
- ✓Structured processes with predetermined criteria before evaluation begins are the most effective way to reduce anchoring's influence.
Anchoring bias was first identified by psychologists Amos Tversky and Daniel Kahneman in 1974, and it's one of the most studied and replicated findings in behavioral science. The core mechanism is straightforward: the first number, impression, or piece of data you encounter becomes an anchor, and your brain adjusts from that anchor rather than evaluating independently. The adjustment is almost always insufficient. In HR, anchoring shows up everywhere. A candidate's current salary anchors the offer. The first interviewer's score anchors the panel's overall assessment. Last year's performance rating anchors this year's evaluation. A manager's initial reaction to a resume anchors their entire read. The bias isn't about stupidity or laziness. It's about how human cognition processes information sequentially. The brain doesn't evaluate each data point in isolation. It evaluates each data point relative to what came before. That's efficient for most daily decisions, but it creates systematic errors in situations where the anchor is misleading, outdated, or completely irrelevant.
How Anchoring Bias Works in the Brain
Anchoring operates through two distinct psychological mechanisms, and both are hard to override.
Insufficient adjustment
When you hear a number (say, a candidate's current salary of $65,000), your brain uses it as a starting point and adjusts from there. The problem is that the adjustment is almost always too small. Research consistently shows that the final estimate stays within 11 to 20% of the original anchor, regardless of where the "right" answer actually is. Even when the anchor is obviously wrong, the adjustment falls short.
Selective accessibility
The anchor activates related information in your memory that is consistent with it. When a recruiter learns a candidate earns $65,000, their brain automatically retrieves information consistent with that salary level: mid-level role, 3 to 5 years of experience, limited scope of responsibility. This happens even if the candidate is actually senior-level and severely underpaid. The anchor shapes which information the brain considers relevant.
Why expertise doesn't protect you
Studies show that anchoring bias affects experts just as much as novices. Experienced real estate agents anchored on listing prices just like first-time buyers. Experienced judges anchored on prosecution sentencing recommendations. In HR, experienced recruiters anchored on salary history just as strongly as new recruiters. Expertise changes the content of the decision but doesn't change the cognitive process that makes anchoring work.
Anchoring Bias in Compensation Decisions
Salary decisions are the highest-stakes context where anchoring operates in HR.
| Anchoring Scenario | What Gets Anchored | Typical Impact | Better Approach |
|---|---|---|---|
| Candidate discloses current salary | The offer amount | Offer stays within 10-20% of the disclosed number, regardless of market rate | Don't ask. Use market data and internal pay bands as the anchor instead |
| Previous year's salary during raise cycle | The new salary | Managers adjust from current salary rather than market rate | Start with updated market benchmarks and role expectations, then compare to current pay |
| First offer in negotiation | The final agreed compensation | The party who states a number first sets the range for the entire negotiation | Use salary ranges posted in job descriptions so both parties start from the same anchor |
| Peer's salary becomes known | Expectations for own compensation | Employee anchors on the peer's number and evaluates their own pay relative to it | Build transparent pay structures so employees understand how compensation decisions are made |
| Budget ceiling communicated first | Manager's willingness to advocate for raises | Manager self-censors recommendations to stay within the anchored budget | Share market data first, budget constraints second |
Anchoring Bias in Hiring and Interviews
The hiring process creates multiple anchor points that shape decisions about candidates.
Resume anchoring
The first piece of information a recruiter sees on a resume becomes an anchor. If the first line mentions a prestigious company, everything that follows gets interpreted more favorably. If the first line mentions a company the recruiter has never heard of, the candidate starts at a disadvantage. This is why resume format and ordering matter far more than most people realize.
Interview sequence effects
In panel interviews, the first interviewer's score anchors subsequent scores. If Interviewer 1 gives the candidate an 8/10 and shares this before Interviewer 2 rates them, Interviewer 2's rating will cluster closer to 8 than it would have independently. This is why interview scores should be submitted independently before any group debrief.
The salary expectation anchor
When candidates are asked "What are your salary expectations?" early in the process, that number becomes the anchor for every compensation discussion that follows. If the candidate asks for $90,000 and the role's budget is $120,000, the recruiter is more likely to offer $95,000 (adjusted from the candidate's anchor) than $115,000 (adjusted from the market anchor). The candidate's undervaluation becomes self-reinforcing.
Anchoring Bias in Performance Management
Performance evaluations are riddled with anchor points that distort ratings.
Previous rating anchoring
Last year's performance rating is the most common anchor in performance reviews. A manager sees that an employee was rated "Meets Expectations" last year and unconsciously starts this year's evaluation from that same point. This creates rating inertia: employees who were once rated high tend to stay rated high, and employees who were once rated low tend to stay rated low, regardless of actual performance changes.
Self-assessment anchoring
When employees submit self-assessments before the manager writes their review, the self-assessment becomes an anchor. If the employee rates themselves highly, the manager's rating shifts upward. If the employee is modest, the manager's rating shifts downward. Some organizations ask managers to complete their draft before seeing the self-assessment to prevent this.
Goal-setting anchoring
Targets set at the beginning of the year anchor the evaluation at the end. If a sales target was set at $1 million and the rep achieved $950,000, the evaluation anchors on the $50,000 shortfall. But if market conditions deteriorated and the average rep achieved $800,000, the $950,000 result is actually exceptional. The original target anchors the perception of the result.
Anchoring Bias Research and Data
Decades of behavioral science research confirm anchoring's persistence across professional contexts.
How to Reduce Anchoring Bias in HR Decisions
Because anchoring can't be eliminated through awareness alone, organizations need structural safeguards.
- Stop asking candidates about salary history. Use market data, internal pay bands, and role-based compensation ranges as the anchor instead. Salary history perpetuates past underpayment, especially for women and people of color.
- Post salary ranges on job descriptions. When both parties start from the same anchor (the published range), the negotiation gap narrows and outcomes become more equitable.
- Require interviewers to submit scores independently before any group debrief. This prevents the first speaker's assessment from anchoring the panel's discussion.
- Complete performance evaluations before reviewing the employee's previous year's rating or self-assessment. Evaluate this year's work on this year's evidence.
- Present market compensation data to managers before they see their team's current salaries during raise planning. This sets the market as the anchor, not the current pay.
- Use structured scoring rubrics with predefined criteria and rating scales. The rubric becomes the anchor, replacing whatever arbitrary data point would otherwise take that role.
- Train hiring managers on anchoring bias with examples specific to compensation and interview scoring. Show them how the bias works and give them concrete steps to counteract it.
Frequently Asked Questions
Can I use anchoring bias strategically in negotiations?
Why do salary history bans exist?
Is anchoring bias the same as first impression bias?
How does anchoring bias interact with pay equity?
Can training eliminate anchoring bias?
What's the difference between anchoring bias and status quo bias?
Written by Adithyan RK