The subtle biases of interviewers can shape destinies. These biases, often concealed beneath the surface, have the power to sway hiring decisions and determine the course of careers.

In this article, we take an in-depth look at the concept of interviewer bias. This term describes how interviewers can sometimes make unfair judgements about candidates without realising it. We’ll explore various types of interviewer bias, like confirmation bias, which reinforces first impressions, or stereotype bias, which unfairly categorises candidates. These biases often significantly influence the final decisions made in interviews.

We’re here to equip you with strategies and tips, enabling you to confront and mitigate interviewer bias effectively. From the implementation of structured interviews that instil fairness to bias awareness training that empowers interviewers to unmask and address their own biases.

We’ll emphasise the importance of diverse interview panels, blind recruitment techniques and the establishment of objective evaluation criteria. These measures are the pillars of bias reduction, championing equitable, inclusive and impactful hiring decisions.

As we explore the impact that interviewer bias has on job interviews and explore the strategies to dismantle it, you’ll gain invaluable insights into constructing a more equitable interviewing process. Whether you’re an interviewer seeking to bestow fairness in assessments or a candidate yearning for an even playing field, this guide is your compass. 

What Is Interviewer Bias?

Interview bias is a phenomenon characterised by the presence of unfair and often unintended preferences or prejudices that can influence the outcome of a job interview. This bias manifests when the interviewer’s own viewpoints, preconceived notions or personal judgements inadvertently impact their evaluation of a candidate. 

Instead of conducting an assessment solely based on the candidate’s qualifications, skills and professional experience, the interviewer’s subjective opinions and biases may come into play.

The consequence of interview bias is that it can lead to unequal and unjust treatment of candidates participating in the interview process. This means that less-qualified individuals might be selected for a position instead of more capable candidates, and highly qualified candidates may be unfairly turned down. 

Interview bias skews the hiring process, undermining the goal of selecting the most suitable candidate for a job based on objective and relevant criteria.

Several Common Biases When Interviewing

Interview bias takes various forms, and in this section, we’ll shed light on common interview biases that candidates may encounter. To help you better understand each type of interview bias, we’ll also provide practical examples for each.

Confirmation Bias

Confirmation bias in the context of a job interview is a cognitive tendency where the interviewer unintentionally and selectively seeks information that aligns with their initial impression of a candidate. 

Instead of maintaining an impartial and open-minded stance, the interviewer may unconsciously favour data or responses from the candidate that reinforce their initial judgements. This can lead to the interviewer giving more weight to information that supports their preconceived notion about the candidate while downplaying or overlooking evidence that contradicts it.

Confirmation bias can hinder objective and fair evaluation during the interview process. It can result in interviewers inadvertently cherry-picking information that confirms their early opinions about a candidate, potentially leading to an inaccurate assessment of the candidate’s qualifications and suitability for the current job vacancies. This bias may prevent interviewers from fully considering all available evidence, ultimately compromising the integrity of the interview and the selection of the best candidate.

Example of Confirmation Bias

Imagine an interviewer reads a candidate’s professional CV and notices they attended the same college. The interviewer may subconsciously form a positive impression based on this shared alma mater. 

During the interview, they may focus on the candidate’s responses that align with this initial positive impression and unconsciously disregard or downplay any negative aspects, like a lack of relevant experience.


Stereotyping, as it pertains to job interviews, refers to a cognitive bias where interviewers lean on preconceived ideas or generalisations about specific groups of people. This bias can lead to unfair and biased judgements regarding a candidate’s capabilities and qualifications. 

Rather than assessing candidates based on their unique skills, experiences and qualifications, interviewers may unconsciously make assumptions about a candidate’s abilities based on stereotypes associated with their gender, age, ethnicity or other characteristics.

This bias can be detrimental to the interview process as it can cloud an interviewer’s judgement and prevent them from accurately evaluating a candidate’s potential. Stereotyping may lead interviewers to overlook valuable professional skills and experiences a candidate possesses or, conversely, unfairly assume that certain candidates lack particular abilities due to their membership in a specific group. 

Stereotyping hinders the fair and equitable assessment of candidates and can potentially result in the selection or rejection of individuals based on biased perceptions rather than objective qualifications.

Example of Stereotyping

If an interviewer holds a stereotype that older workers are less adaptable to change, they might unfairly assume that an older candidate lacks the ability to learn new technology. This bias can lead to the rejection of a highly qualified older candidate for a tech-related role based on age-related assumptions.

Halo Effect

The Halo Effect is a cognitive bias in which an interviewer forms a favourable impression of a candidate based on one specific aspect of their background or appearance. 

This initial positive impression can influence the interviewer’s overall perception of the candidate, leading them to unconsciously assume that the candidate excels in all areas, even if there is no evidence to support this belief.

This bias can be problematic because it can lead to an overly positive evaluation of a candidate that is not based on a comprehensive assessment of their qualifications and skills. 

Interviewers affected by the Halo Effect may overlook weaknesses or shortcomings in the candidate’s qualifications and experience, assuming that their initial positive impression is indicative of overall excellence. This can result in the selection of candidates who may not be the best fit for the job, as their strengths and weaknesses have not been objectively evaluated.

Example of Halo Effect

Suppose a candidate walks into the interview room looking exceptionally confident and well-dressed. The interviewer is immediately impressed by their appearance and assumes they must excel in all aspects of the job, including technical skills. As a result, they may overlook the candidate’s weaknesses. 

Similarity Bias

Similarity Bias refers to a cognitive bias where interviewers tend to show preferential treatment to candidates who share similarities with themselves, whether in terms of background, interests or personality traits. This bias can lead interviewers to unconsciously favour candidates whom they perceive as more relatable or similar to themselves.

This bias can be problematic as it may cause interviewers to overlook or undervalue the qualifications and potential of candidates who do not share these similarities. It can lead to an imbalanced assessment where a candidate’s fit within the organisation or their potential to excel in the role is unfairly influenced by the interviewer’s personal biases related to familiarity or perceived commonalities.

Similarity Bias can hinder the fair evaluation of candidates and may result in the selection of individuals who are not necessarily the best fit for the job, but who resonate more personally with the interviewer.

Example of Similarity Bias

An interviewer discovers that a candidate shares their love for a particular hobby, like golf. They might unconsciously favour the candidate, assuming that shared interests make for a better working relationship. This bias can cloud their judgement of the candidate’s qualifications and fit for the job.

Contrast Effect

The Contrast Effect, in the context of job interviews, is a cognitive bias that occurs when interviewers assess a candidate’s performance by comparing them to others who were interviewed either before or after them, rather than evaluating the candidate independently. This bias can significantly impact the interviewer’s perception of a candidate.

If the previous candidate in the interview lineup was exceptionally strong and impressive, the current candidate might appear less impressive in comparison, even if they possess strong qualifications and skills. Conversely, if the previous candidate performed poorly, the current candidate might appear more favourable in contrast, potentially receiving a more positive evaluation than they would if considered in isolation.

The Contrast Effect can be problematic because it can lead to unfair judgements of candidates based on the relative performance of others rather than their own qualifications and abilities. It can result in candidates being either unfairly advantaged or disadvantaged due to circumstances beyond their control.

Example of Contrast Effect

In a series of interviews, the first candidate was exceptionally strong and experienced. When the second candidate is interviewed, the interviewer might compare them to the first candidate, making them seem less impressive by contrast, even if they are well-qualified for the position.

Availability Bias

Availability Bias in the context of a job interview refers to a cognitive bias where interviewers give disproportionate weight to information that is readily available or easily recalled in their memory when assessing a candidate. This means that instead of considering the complete spectrum of a candidate’s qualifications and skills, they focus on specific pieces of information that come to mind more readily.

This bias can manifest when interviewers rely heavily on recent or memorable information, potentially overlooking other pertinent factors that may not be as easily accessible in their memory. As a result, they may form judgements about a candidate’s suitability for a role that is skewed or incomplete.

Example of Availability Bias

An interviewer recently had a negative experience with a candidate who lacked a specific certification. When reviewing resumes, they place undue importance on that certification, assuming it’s a crucial requirement for all candidates, even though it may not be relevant to the current job openings.


Groupthink, particularly in the context of panel interviews, is a phenomenon characterised by collective decision-making that prioritises conformity over objective and independent evaluation. 

It occurs when the dynamics within a group of interviewers lead to a situation where one person’s opinion, even if it is biased or not entirely rational, influences the judgements and assessments of the others.

In panel interviews, the collaborative nature of the process can sometimes unintentionally give rise to Groupthink. Interviewers may be influenced by the perspectives or opinions of their peers, often due to a desire to avoid conflict, maintain harmony or conform to the perceived consensus within the group. 

This can result in a biased evaluation of a candidate, as one individual’s viewpoints may unduly shape the overall assessment, leading to decisions that are not necessarily based on the candidate’s actual qualifications and skills.

Example of Groupthink

In a panel interview, one member of the panel expresses a strong negative opinion about a candidate early in the process. Other panel members, not wanting to disagree or create conflict, may conform to this opinion, leading to a biased evaluation of the candidate based on the first panellist’s perspective.

Why It Is So Important to Avoid Bias?

Organisations need to be aware of these biases and take steps to minimise them during the interview process, such as using structured interview questions and training interviewers to be mindful of their potential biases. This helps ensure that candidates are evaluated fairly based on their skills and qualifications, rather than irrelevant factors.

Recognising and addressing interview bias is crucial for several reasons:


Bias can lead to unfair treatment of candidates. When decisions are influenced by factors unrelated to skills and qualifications, it creates an uneven playing field. This means that some highly-qualified candidates may miss out on opportunities while less-qualified candidates may be selected, simply due to biases.

Diversity and Inclusion

Bias can hinder efforts to create diverse and inclusive workplaces. When certain groups of candidates face consistent biases, it can result in underrepresentation in the workforce. Promoting diversity and inclusion in recruitment is not only a matter of fairness but also positively impacts innovation and creativity within an organisation.

Quality of Hires

Unchecked bias can lead to suboptimal hiring decisions. Candidates who are truly the best fit for a role may be overlooked in favour of those who fit the interviewer’s biases. This can negatively impact an organisation’s performance and productivity.

Legal and Ethical Considerations

Discrimination based on protected characteristics such as race, gender, age or disability is not only ethically wrong but can also lead to legal consequences for organisations. Being aware of and addressing bias helps organisations stay in compliance with anti-discrimination laws.

How to Prevent Interviewer Bias

Organisations can work toward a more equitable and effective hiring process, ensuring that candidates are evaluated based on their skills and qualifications rather than irrelevant factors. 

To mitigate bias during the interview process, organisations can take the following steps:

Structured Interviews

Structured interviews involve implementing a consistent set of job-related questions and evaluation criteria for all candidates. This approach ensures that each candidate is asked the same questions, making comparisons fairer and less influenced by personal biases. 

Competency-based interviews help standardise the assessment process, allowing interviewers to focus on candidates’ qualifications and responses rather than subjective judgements or biases. This method reduces the likelihood of unfairly favouring candidates based on factors unrelated to the job.

Bias Awareness Training

Bias awareness training is a vital tool to educate interviewers about their potential biases and how to avoid them. It typically includes education on various types of biases, such as confirmation bias or stereotype bias and provides strategies to mitigate these biases during the interview process. 

By increasing interviewers’ awareness of their own biases and providing them with tools to address them, organisations can promote fairer and more equitable hiring decisions.

Diverse Interview Panels

Involving multiple interviewers from diverse backgrounds in the interview process is an effective way to counteract individual biases. Different perspectives brought by interviewers from various demographics and experiences can help ensure a more well-rounded evaluation of candidates. Diverse interview panels reduce the risk of one individual’s biases unduly influencing the assessment, leading to fairer evaluations that consider a broader range of factors.

Blind Recruitment

Blind recruitment aims to remove personally identifiable information from CVs and applications during the initial screening process. This prevents unconscious biases related to factors like name, gender or age from influencing early decisions. 

By focusing solely on candidates’ qualifications and experience, blind recruitment helps organisations assess candidates based on their skills and qualifications rather than superficial characteristics.

Feedback and Evaluation

Regularly reviewing the interview process and outcomes is crucial for identifying and addressing bias-related issues. Organisations should encourage feedback from both interviewers and candidates to gain insights into potential biases or areas for improvement. 

By continuously assessing and refining the interview process, organisations can strive for fairness and equity in the recruitment process, ensuring that candidates are evaluated based on their merits rather than biases or stereotypes.

How Can Bias Affect a Job Interview?

Bias can significantly impact a job interview in several ways, often leading to unfair treatment of candidates and influencing hiring decisions based on factors unrelated to their qualifications and skills. 

Here’s how bias can affect a job interview:

Unfair Evaluation

When bias creeps into the interview process, it can lead to unequal treatment of candidates. Interviewers may unconsciously favour or disfavour certain candidates, resulting in inconsistent assessments. 

Missed Talent

Bias can cause interviewers to overlook highly qualified candidates. When decisions are influenced by factors like race, gender, age or other irrelevant characteristics, organisations miss out on valuable talent that could contribute significantly to their success.

Inaccurate Hiring Decisions

When interviews are tainted by bias, hiring decisions may not align with the best interests of the organisation. This can result in the selection of candidates who may not perform well in the role or fit within the company culture.

Negative Impact on Diversity and Inclusion

Bias can hinder efforts to create diverse and inclusive workplaces. When certain groups consistently face biases, it can lead to underrepresentation and a lack of diversity in the workforce.

Legal and Ethical Consequences

Discrimination based on protected characteristics, such as race, gender or age, is not only ethically wrong but can also have legal repercussions for organisations. It’s essential to be aware of and address bias to ensure compliance with anti-discrimination laws.

Decreased Morale

It is important for organisations to create a healthy and happy work environment. When candidates perceive bias in the interview process, it can damage the organisation’s reputation and decrease employee morale. Candidates who feel unfairly treated may share their negative experiences, affecting the company’s brand and ability to attract top talent.


Avoiding interviewer bias isn’t just a noble aspiration; it’s imperative for creating fair and equitable hiring processes. 

Armed with the knowledge and strategies we’ve discussed, you have the power to effect change. By implementing structured interviews, offering bias awareness training and promoting diversity in your interview panels, you can contribute to a more just and effective hiring process.

At Joss Search, we understand the significance of fair and bias-free recruitment, particularly in business support roles

As a specialised recruitment agency, we are committed to helping organisations find the best talent while ensuring a level playing field for all candidates. Contact Joss Search to transform your hiring process and attract top-notch business support professionals. 

Read more helpful interviewing guides here.