# Types of Unconscious Bias: The Nine You'll Actually Meet at Work Canonical URL: https://headwayskills.com/knowledge/self-awareness/types-of-unconscious-bias/ Markdown URL: https://headwayskills.com/knowledge/self-awareness/types-of-unconscious-bias.md Entity type: Article Last updated: 2026-07-07 Language: en Primary audience: professionals improving building self-awareness at work Owner: Headway Skills Contact: https://headwayskills.com/contact/ ## Short answer The nine types of unconscious bias that show up at work - affinity, halo, name, confirmation, anchoring and more - what each one looks like and how to catch it. ## Key facts - Title: Types of Unconscious Bias: The Nine You'll Actually Meet at Work - Category: Self-Awareness - Primary skill: Building Self-Awareness - Related skills: Decision-Making, Professional Behaviors - Primary keyword: types of unconscious bias - Source page: https://headwayskills.com/knowledge/self-awareness/types-of-unconscious-bias/ ## What this page covers - The nine types of unconscious bias that show up at work - affinity, halo, name, confirmation, anchoring and more - what each one looks like and how to catch it. - Practical guidance for types of unconscious bias - How this topic connects to Building Self-Awareness ## Detailed explanation Anyone who has formed a quick opinion about a colleague has run one of these. Unconscious bias is the judgment your mind makes before you have consciously decided anything, and the reason people go looking for the categories is sound: a bias you can name is a bias you can notice. The types of unconscious bias most likely to reach an ordinary working day are affinity bias, the halo and horns effects, perception bias, name bias, confirmation bias, anchoring bias, attribution bias, the contrast effect, and conformity bias. Each one bends judgment in a different direction, and each leaves a different trace. What almost no list mentions is that these nine do not all fail in the same way — and that difference decides [what you can do about them](/knowledge/self-awareness/how-to-overcome-unconscious-bias/). ## The two ways a bias goes wrong Sources cannot agree on how many exist. Page-one guides variously count five, ten, eleven, twelve, thirteen, and nineteen, while training providers including Traliant and DiversityResources assert that more than 150 types are common to the workplace, without pointing to anything countable. Treat any list, this one included, as a working vocabulary rather than a finished inventory. More useful than the count is a line the lists rarely draw. Some of these biases are group-based: they attach to a person because of a category they appear to belong to, and the damage lands on relationships. Others are judgment errors that would happen even if the thing being assessed were a spreadsheet. The remedies diverge accordingly — group-based bias needs exposure and [other people's observations](/knowledge/self-awareness/how-to-ask-for-feedback/), because you cannot see an association from inside it, while judgment errors need process: a second opinion, independent input, criteria fixed before you look. It is also worth knowing who most of this material was written for. SHRM frames the stakes as who gets hired, developed, and promoted — standard for the topic, and addressed to readers with authority over other people's careers. The aggregate is real: NHS Workforce Race Equality Standard data found that in the average trust in 2016, white staff were 69% more likely than Black, Asian and Minority Ethnic staff to be appointed from a shortlist, narrowing to 56% by 2018. Everyone in that comparison had already been judged qualified on paper, which puts the effect in the judgment stage rather than in credentials. But an aggregate like that is assembled from a great many small reads, most made by people with no hiring authority — which is where you meet this first, and where it is easiest to catch. ## The nine types of unconscious bias you will actually meet at work ### 1. Affinity bias Affinity bias, sometimes called similarity bias, is the pull toward people who resemble you — same university, same hometown, same accent, same weekend interests — and the quiet conversion of that familiarity into an impression of competence. It appears first or near-first in almost every taxonomy, including Monash University's and Catalyst's, and it is hard to spot because nothing about it registers as a preference. It registers as the conversation being easy. Its everyday form has nothing to do with hiring: whose draft you read generously, whose idea you back in a meeting, who you eat lunch with. ### 2. The halo effect and the horns effect The halo effect is one salient trait, action, or first impression coloring every judgment that follows; the horns effect is the same mechanism running negative. A recognizable former employer or one confident presentation becomes evidence of judgment in areas you have never watched the person work. What separates it from affinity bias is direction: affinity runs on resemblance to you, while the halo generalizes from one attribute of them. Sources tie it directly to first impressions, so it usually forms in the opening days of a working relationship and then goes untested for months. ### 3. Perception bias Perception bias is letting a stereotype about a group stand in for an assessment of the individual. Two illustrations recur across the sources: assuming a part-time colleague is not serious about their career because they work fewer hours, and assuming someone using a workplace accommodation is not working as hard as everyone else. In each case the conclusion came from a visible arrangement rather than from anything the person produced. That is the mechanism in miniature — a category quietly substituted for evidence. ### 4. Name bias Name bias is judging someone by their name and the background it implies. It is the most measurable entry here, because names can be varied experimentally while everything else on an application stays identical. The best-known result is the resume-audit study by Bertrand and Mullainathan, *Are Emily and Greg More Employable than Lakisha and Jamal?*, which found that white-sounding names drew substantially more interview callbacks. The figure circulates through workplace coverage mostly at second hand, so cite the study rather than any precise percentage attached to it. ### 5. Confirmation bias Confirmation bias is looking for, and giving extra weight to, information that supports what you already think — selective observation rather than deliberate dismissal. Its real significance on this list is what it does to the four entries above it: once an affinity read or a first impression has formed, this is the bias that seals it. You are not ignoring the evidence that cuts the other way; you are noticing it less. It is also one of four named decision traps professionals are taught to watch for, alongside overconfidence, anchoring, and the [sunk-cost trap](/knowledge/decision-making/sunk-cost-fallacy/). ### 6. Anchoring bias Anchoring bias is over-weighting whatever information arrives first, so every later judgment becomes an adjustment from that starting point instead of an independent assessment. Sources describe it as the power of first impressions applied to information rather than to people. The practical version is familiar to anyone who has negotiated anything: the first figure named — a salary, an estimate, a deadline — sets the range everyone then argues inside, however poorly founded it was. ### 7. Attribution bias Attribution bias is the asymmetry in how you explain causes. Your own setbacks get attributed to circumstances and your successes to ability, while the logic runs backwards for other people, whose failures become character and whose wins become luck. Unlike the group-based entries, this one concerns explanations rather than traits, and it does most of its damage privately — in the story you tell yourself about why a teammate is behind, which then shapes how much slack you extend them. ### 8. Contrast effect The contrast effect is judging someone against whoever came immediately before, rather than against the actual standard. A solid candidate looks weak following an exceptional one and strong following a poor one, with nothing about the person changing between the two readings. What makes it distinctive is that it is purely situational — the assessment tracks the order of the sequence — which also makes it the most straightforwardly fixable item here. Set the criteria first, and score each person before comparing them to anyone. ### 9. Conformity bias Conformity bias is [adopting the group's view](/knowledge/decision-making/groupthink/) in place of your own assessment, driven by the wish for acceptance and for holding opinions the majority finds agreeable. It has a specific bite early in a career: the social cost of dissent is highest for the person with least standing, so the newest person in the room is likeliest to fall in line — and often the one whose read is least contaminated by the group's history. It is also the only entry generated by the setting rather than by your own associations. ## What it actually takes to catch one There is a real awkwardness in every article on this subject, this one included: the lists ask you to be aware of things they have just defined as operating outside awareness. Naming the categories helps, but only so far. Two things work better than harder introspection. The first is slowing down — the one countermeasure that appears in essentially every source, on the grounds that time pressure and anxiety both increase how much you lean on automatic judgment. The second is other people, because a blind spot is defined by being invisible from where you are standing. Harvard's Implicit Association Test is the most frequently named self-assessment here and a decent prompt for reflection, but a colleague telling you what they notice about how you weigh people reaches somewhere no self-report can. If you would rather not guess from the inside, an outside read of [your own blind spots](https://assessment.headwayskills.com/) is free and takes minutes. ## The skills that turn this list into something you do Look back at what actually works here and notice how little of it is knowledge about bias. Pausing before a judgment, asking for the view you would rather not hear, treating people evenhandedly when nothing obliges you to — those are habits, built like any other. **Building Self-Awareness** is where this topic lives. Recognizing your own unconscious assumptions about groups, backgrounds, and roles is a named part of it, sitting alongside knowing your genuine strengths and catching the exaggerated beliefs that drive your overreactions. The structural catch is the one above: this is the skill that depends most on feedback, because what you are looking for is precisely what you cannot see unaided. Asking a colleague what they notice is not self-criticism. It is instrumentation. **Decision-Making** is where four of the nine entries do their damage — confirmation bias, anchoring, attribution, and the contrast effect distort judgment calls rather than relationships. The countermeasures are practical: get another opinion, including from someone experienced who disagrees with you; slow down when you are rushed or emotional; gather input independently before a group converges; work from data rather than the impression you formed. Almost none of that happens inside your own head, which is the point. It is also one of twelve work skills the free Work Skills Test reads, and the one people are most surprised to find attached to a topic like this. **Professional Behaviors** is what any of this looks like from the outside, because a bias stays invisible until it becomes behavior. Treating everyone impartially, showing genuine interest rather than performing it, speaking about absent colleagues as you would with them in the room — these are the small observable choices where affinity bias either wins or does not. Since the first of those three is the one you cannot reliably build alone, reading gives you the vocabulary but not the diagnosis. Seeing [which habits are already yours](https://assessment.headwayskills.com/) tells you where the effort is worth spending. You may already recognize some of this in how you work — the second look you take at a first impression, the meeting where you deliberately asked the quietest person first. Consider which groups your own experience has given you least contact with — those are the reads that are least accurate, and where attention buys the most. None of it asks you to become a different person; the habits that do not come naturally yet are learnable, and they carry more weight as your judgment starts to affect other people's opportunities. By looking up the types of unconscious bias at all, rather than filing the subject under things other people should worry about, you have already done the part most readers never get to. ## See which of these habits are already yours You have the vocabulary now; what is left is finding out where you actually stand. The **free** Work Skills Test is a short self-assessment — about 7 minutes — that maps you across all twelve work skills, including the self-awareness, decision-making, and everyday professional habits that decide whether your biases ever reach a decision. You finish knowing which are already working for you and which few are worth deliberate attention now. **[Discover my skills](https://assessment.headwayskills.com/)** *Free, and about 7 minutes from start to your results.* ## Who this is for - Professionals building practical workplace skills - Readers looking for specific, usable work advice - Managers, educators, and coaches supporting career readiness ## Common questions ### What is this guide about? The nine types of unconscious bias that show up at work - affinity, halo, name, confirmation, anchoring and more - what each one looks like and how to catch it. ### Which Headway skill does this connect to? This guide connects primarily to Building Self-Awareness. It also relates to Decision-Making, Professional Behaviors. ### What is the recommended next step? Use the free Work Skills Test to reflect on which work skill to improve next. ## Related pages - https://headwayskills.com/knowledge.md - https://headwayskills.com/knowledge/self-awareness.md - https://headwayskills.com/knowledge/decision-making.md - https://headwayskills.com/knowledge/professional-behaviors.md - https://headwayskills.com/work-skills-test.md ## Citation guidance Use the canonical page when citing this content: https://headwayskills.com/knowledge/self-awareness/types-of-unconscious-bias/ Preferred summary: "The nine types of unconscious bias that show up at work - affinity, halo, name, confirmation, anchoring and more - what each one looks like and how to catch it." ## Change log - 2026-07-07: Content collection version published.