Recruiting

Types of hiring bias and how it affects candidate pools

Yuri Kostun May 30, 2025 4 minutes read

Hiring bias refers to the conscious or unconscious preferences or prejudices that influence how hiring decisions are made. These biases can lead to unfair evaluations of candidates and ultimately affect the quality, diversity, and performance of a company’s workforce¹.

Types of Hiring Bias

Affinity Bias
Hiring managers favor candidates who are similar to themselves — in background, interests, personality, or education².
Example: Choosing a candidate because they attended the same university.
Confirmation Bias
The manager forms an early impression (often from a resume or LinkedIn photo) and then seeks evidence during the interview to support that impression³.
Halo/Horns Effect
A single strong (or weak) attribute overshadows the rest of the candidate’s qualifications⁴.
Halo: Assuming someone is a great leader because they worked at a top company.
Horns: Dismissing someone because of a minor resume gap.
Name/Appearance Bias
Judgments are made based on names, accents, or appearances that are perceived as foreign, ethnic, or nontraditional.
Example: Candidates with “ethnic-sounding” names receive fewer callbacks⁵.
Age, Gender, and Racial Bias
Stereotypes and assumptions about different demographic groups can affect assessments of competence, leadership, and cultural fit⁶.
Pedigree Bias
Overvaluing degrees from elite institutions or experience at brand-name companies — sometimes at the expense of real-world performance or adaptability⁷.

How Hiring Bias Affects Hiring Managers

Missed Talent
Qualified candidates may be screened out for non-performance-based reasons. This leads to a smaller and less diverse talent pool⁸.
Poor Team Diversity
Affinity bias can result in homogenous teams that lack diversity of thought, which research shows hampers innovation and decision-making⁹.
Reinforcement of Stereotypes
If unchecked, biased hiring becomes self-reinforcing. For example, if a team is predominantly male, hiring managers may unconsciously believe men are a “better fit”¹⁰.
Overconfidence in Judgment
Hiring managers often rely on intuition (“gut feeling”), believing they’re good at reading people. This confidence can mask bias and override structured evaluation criteria¹¹.
Increased Turnover and Lower Performance
Hiring decisions based on “fit” or subjective preferences instead of competencies may result in hires who don’t meet performance expectations or leave early¹².
Reputational Risk
Patterns of biased hiring can harm a company’s employer brand, particularly among underrepresented groups or in public-facing audits of DEI progress¹³.

What Hiring Managers Can Do

Structured Interviews: Use consistent questions and scoring rubrics¹⁴.
Blind Resume Reviews: Remove identifying info from resumes before review¹⁵.
Training & Awareness: Participate in bias training focused on real-world hiring scenarios¹⁶.
Diverse Panels: Include multiple perspectives in the interview process.
Data & Feedback: Review hiring data to spot trends in bias and address gaps.

Hiring bias is rarely malicious — it’s often the result of time pressure, mental shortcuts, or cultural norms. But left unchecked, it leads to missed opportunity, weakens team performance, and puts companies at risk in an increasingly diverse and competitive labor market. For hiring managers, recognizing and actively counteracting bias is not just an ethical imperative — it’s a strategic one¹⁷.

Footnotes

Bohnet, I. (2016). What Works: Gender Equality by Design. Harvard University Press. ↩
Harvard Business Review. (2017). “Why We’re Biased Toward People Like Us.” ↩
McCarthy, J. (2016). “The Power of the First Impression.” Psychology Today. ↩
Uhlmann, E. L., & Cohen, G. L. (2005). “Constructed Criteria: Redefining Merit to Justify Discrimination.” Psychological Science. ↩
Bertrand, M., & Mullainathan, S. (2004). “Are Emily and Greg More Employable Than Lakisha and Jamal?” American Economic Review. ↩
Equal Employment Opportunity Commission (EEOC). (2020). “The State of Age, Gender, and Race Discrimination in Hiring.” ↩
Rivera, L. A. (2015). Pedigree: How Elite Students Get Elite Jobs. Princeton University Press. ↩
Hunt, V., Layton, D., & Prince, S. (2015). “Why Diversity Matters.” McKinsey & Company. ↩
Rock, D., Grant, H., & Grey, J. (2016). “Diverse Teams Feel Less Comfortable — and That’s Why They Perform Better.” Harvard Business Review. ↩
Castilla, E. J., & Benard, S. (2010). “The Paradox of Meritocracy in Organizations.” Administrative Science Quarterly. ↩
Kahneman, D. (2011). Thinking, Fast and Slow. Farrar, Straus and Giroux. ↩
Harvard Business Review. (2020). “Why ‘Culture Fit’ Is the Wrong Way to Hire.” ↩
Deloitte. (2020). “The Diversity and Inclusion Revolution: Eight Powerful Truths.” ↩
Structured Interviewing Guide, Society for Human Resource Management (SHRM). ↩
BBC. (2017). “The Company That Hired Blind.” ↩
Google Re:Work. “Unconscious Bias at Work” training materials. ↩
CIPD (2022). “The Impact of Bias in the Hiring Process.” ↩