0
0
Someone new walks into the room. They are tall, calm and well dressed. They smile easily and speak clearly. Within about a minute, without deciding to, you have also made up your mind that they are probably clever, probably honest and probably good at their job.
You have no evidence for any of that. You saw one good thing, and your mind filled in the rest.
That habit has a name: the halo effect. Tens of thousands of people look it up every month, often after catching themselves doing it, or after watching someone else get a free pass they did not earn. Here is what the halo effect is, where the name really came from, the strangest thing researchers found about it, and a few simple ways to judge people more fairly.
What Is the Halo Effect?
The halo effect is when one quality you like in a person spills over onto everything else about them. If someone is good-looking, confident or friendly, we tend to assume they are also smart, kind and capable, even when we have seen nothing that shows it.
The one good trait acts like a glow around the whole person. Everything else gets seen through that glow.
It works the other way too. If the first thing you notice about someone is a bad trait, like a messy shirt, a strong accent you are not used to, or a nervous voice, you may start assuming other bad things about them. Psychologists sometimes call that the horns effect. Same mistake, opposite direction.
None of this makes you a bad person. It is how human minds save effort. Judging every quality of every person separately is hard work, so the mind takes a shortcut: good in one way, probably good in every way. Most of the time we never notice the shortcut being taken.
If you are the kind of person who wants to notice what is really going on inside you in ordinary moments like these, there is a free video guide and companion PDF about finding something deeper in the everyday parts of real life. It is a gentle place to start.
Where the Name Came From: Officers Who Were Told Not to Do It
The name comes from the American psychologist Edward Thorndike, in a short paper published in 1920 called “A Constant Error in Psychological Ratings”.
It is often retold as “officers rating soldiers.” The real details are more interesting than that.
Thorndike looked at army rating forms. Officers had to score the men under them on four separate things: physical qualities, intelligence, leadership and character. The instructions were not subtle. They told the officers, again and again, to rate each quality on its own and to “consider only the qualification it covers, totally disregarding all the others.”
They could not do it.
Thorndike’s main example was one flight commander rating 137 aviation cadets. Thorndike called him “a very conscientious officer.” Even so, his scores for intelligence rose and fell closely with his scores for physique, leadership and character. The link between intelligence and physique was nearly as strong as the others, which, as Thorndike pointed out, made no sense. How tall and fit a cadet looked should have had far less to do with how clever he was than his leadership or his character did.
Thorndike wrote that the raters seemed to “think of the person in general as rather good or rather inferior” and then let that general feeling color everything else. He called it suffusing each rating “with a halo.”
The paper has a second example that people rarely mention. A colleague of Thorndike’s studied official ratings of teachers, ratings that were used to decide their pay and promotions. The score a teacher got for their speaking voice lined up closely with the score they got for their intelligence. Thorndike’s conclusion was blunt: the rating of a teacher’s voice “must have been influenced by the general impression of her ability.”
And here is the part worth remembering. Thorndike did not think this only happened to careless people. He wrote that he had become convinced that “even a very capable foreman, employer, teacher, or department head” is unable to judge a person as a set of separate qualities. He also admitted he could not measure exactly how big the error was. He only knew it looked “surprisingly large.”
The Strangest Part: You Cannot Feel It Happening
Fifty-seven years later, two psychologists, Richard Nisbett and Timothy Wilson, tested the halo effect in a way that turned up something much more unsettling.
In their 1977 study, college students watched a video of a teacher who spoke English with a strong Belgian accent. Half of the students saw a version where he was warm and friendly. The other half saw a version where he was cold and unfriendly. Same man, same face, same accent.
Then the students rated his looks, his mannerisms and his accent.
The students who saw the warm teacher mostly found his looks, mannerisms and accent appealing. The students who saw the cold teacher mostly found the very same things irritating. Liking him changed how he looked and sounded to them.
That alone is striking. But the real surprise came when the researchers asked the students why.
The students insisted that liking or disliking the teacher had not affected how they rated his looks or his accent. Many of the students who saw the cold version believed the opposite was true: they said they disliked him because his accent and mannerisms were irritating. They had the cause and the effect exactly backwards, and they were sure they were right.
That is the real danger of the halo effect. It does not feel like a bias. It feels like seeing clearly.
Halo Effect Examples in Everyday Life
Once you know the pattern, you start to see it in a lot of places.
- Good looks. In a well-known 1972 study titled “What Is Beautiful Is Good,” psychologists Karen Dion, Ellen Berscheid and Elaine Walster found that people who were shown photos of attractive strangers tended to guess those strangers had nicer personalities and happier lives. The photo was all they had to go on.
- Job interviews. A firm handshake and a confident first answer can quietly shape how every later answer gets heard.
- Famous people. Someone who is brilliant at football, acting or music gets listened to about health, money or politics, as if one skill proved all the others.
- Brands. If you love one product from a company, you tend to assume its next product will be good too, before you have tried it.
- School and work. A student who was polite on the first day, or a colleague whose first project went well, can get the benefit of the doubt for months.
- The horns version. A bad first impression, like someone arriving late or looking scruffy, can make everything else they do look worse than it is.
The halo effect is a close cousin of confirmation bias. Once the halo is in place, you start noticing the things that fit it and skipping the things that do not. The first impression stops being a guess and becomes the lens.
An Old Story About a Tall Man
There is a very old story that describes the halo effect almost exactly, about three thousand years before anyone gave it a name.
A prophet is sent to a family to choose the next king from among a set of brothers. The eldest walks in first. He is tall and fine-looking, and the prophet is sure straight away: this must be the one. Then comes the correction. Stop looking at his face and his height. God does not see the way people see. People look at the outside. God looks at the heart.
Two details make the story sharper than it first seems. The nation’s first king, the one who had already gone badly wrong, had been noticed partly because he stood head and shoulders taller than everyone around him. The prophet had seen that mistake happen once already, and he nearly made it again.
The other detail is easy to read past. When the youngest brother is finally brought in from the fields, the story says he is good-looking too. So the lesson is not that attractive people should be distrusted. That would just be the horns effect in disguise. The lesson is that how someone looks was never the evidence in the first place. The prophet was told to look at something the eye cannot rate.
Thorndike landed somewhere very close. His advice to anyone rating a person was to “report the evidence, not a rating,” and to judge each quality on its own evidence, without knowing what the other scores were.
How to Avoid the Halo Effect
You cannot switch it off. Nisbett and Wilson showed that people do not even feel it happening. But you can build a few small habits that give your judgment a second chance. None of these cost anything.
1. Name the first thing you noticed. When you meet someone, ask yourself: what was the very first thing that struck me about them? Their looks, their voice, their confidence, their job title, their clothes? Whatever it was, that is the likely source of your halo, or your horns.
2. Split the person into separate questions. This is Thorndike’s own fix. Instead of asking “Is this person good?”, ask smaller questions one at a time. Are they reliable? Are they kind to people who can do nothing for them? Do they know what they are talking about on this exact subject? Answer each one only with what you have actually seen.
3. Ask “What is my evidence?” For each thing you believe about someone, check whether you saw it happen or just assumed it. “They are smart” is a guess. “They solved that problem in the meeting” is evidence. You will often find the list of real evidence is much shorter than the list of beliefs.
4. Flip it. Imagine the same words or actions coming from someone you do not warm to. Would you still find them convincing? If a confident stranger says something, would it sound as wise from a nervous one? This one test catches a lot.
5. Give it a second look. First impressions form fast. Wait before you decide anything important about a person, whether that is hiring them, trusting them with money, or writing them off. Look again after you have seen them on an ordinary day, not just their best one or their worst one.
It helps to remember that the halo effect points at you as well. Other people are rating you through their own first impressions, which is worth knowing, but it is also worth not worrying about too much. As the spotlight effect shows, far fewer people are watching you closely than it feels like.
Look Past the Glow
You will meet someone new this week. They will have one quality that jumps out at you, good or bad. That part is not up to you.
What is up to you is whether you let that one quality answer every other question. The glow is not always wrong. Sometimes the confident person really is capable, and the nervous one really is struggling. But you only find out by looking past the first thing you saw. That is how you end up judging people fairly, and it is how you would want to be judged too.
Which do you think does more damage in everyday life: the halo effect, where we trust people too quickly, or the horns effect, where we write people off too fast? Tell us in the comments.
And if you would like a simple way to slow down and notice what is really happening inside you in everyday moments like these, the free guide below is a good next step.
If This Helped, Pass It On
- The halo effect: one good trait and we assume the rest. In 1920, army officers were told over and over to rate each quality separately. They still couldn’t do it.
- Strangest thing I learned today: in a 1977 study, people who disliked a teacher said his accent annoyed them. It was the other way round. Liking him changed how he sounded, and they had no idea.
- New habit before I judge someone: what was the first thing I noticed about them, and what is my actual evidence for everything else?
Questions People Ask About the Halo Effect
What is the halo effect in simple terms?
The halo effect is a thinking bias where one positive quality in a person, such as good looks, confidence or friendliness, makes people assume that person has other good qualities too, like intelligence, honesty or skill, without any evidence. The single good trait acts like a glow that colors how everything else about the person is judged. The opposite pattern, where one negative trait makes people assume other bad things, is often called the horns effect.
Who discovered the halo effect?
The halo effect was named by the American psychologist Edward Thorndike in a 1920 paper titled “A Constant Error in Psychological Ratings,” published in the Journal of Applied Psychology. Thorndike studied army rating forms on which officers scored their men separately for physical qualities, intelligence, leadership and character. Even though the officers were firmly instructed to rate each quality independently, their scores for different qualities rose and fell together far more closely than was realistic. Thorndike described this as the raters suffusing each rating “with a halo.”
What is an example of the halo effect?
A common example of the halo effect is judging a good-looking person as also being smarter or kinder. In a 1972 study called “What Is Beautiful Is Good,” researchers Karen Dion, Ellen Berscheid and Elaine Walster found that people shown photos of attractive strangers tended to guess those strangers had more desirable personalities and happier lives. Other everyday examples include trusting a famous athlete’s advice about health or money, or assuming a new product must be good because another product from the same brand was.
Are people aware when the halo effect is happening?
Usually not. In a 1977 study, psychologists Richard Nisbett and Timothy Wilson showed students a video of a teacher with a strong accent acting either warm or cold. Students who saw the warm version rated his looks, mannerisms and accent as appealing, while students who saw the cold version rated the same things as irritating. The students denied that their overall liking had affected these ratings, and many who saw the cold version believed the reverse: that the accent and mannerisms were the reason they disliked him.
How can I avoid the halo effect?
The halo effect cannot be switched off completely, but it can be reduced. A useful approach is to notice the first thing that impressed or bothered you about a person, then judge each quality separately using only what you have actually seen, rather than asking whether the person is good overall. Edward Thorndike, who named the halo effect in 1920, recommended recording the evidence rather than a general rating. It also helps to imagine the same words or actions coming from someone you like less, and to wait for a second look before making an important decision about someone.
