We can find this bias in all aspects of our lives, from interactions at school and in the workplace, to responses to marketing campaigns. When the halo effect takes hold of our decision-making and appraisals, it can hinder our ability to think critically about other peoples’ traits. As a result, we may overlook or disregard certain obvious flaws in both people and products. This skewed perception can cause us to make inaccurate character assessments, or even miss out on valuable opportunities.

First Impressions and Relationships

One area of your personal life most likely to be impacted by the halo effect is your relationships. Have you noticed how new friends or partners often seem flawless until you get to know them better? One theory is that the halo effect causes us to form a positive overall impression of people when they get a “high rating” on a single characteristic. If we initially find someone charming or attractive, we assume they also possess other positive characteristics—like kindness, intelligence, or trustworthiness—even when we haven’t seen any evidence to support this.¹⁰

The problem is that idealizing our partners based on positive traits causes us to overlook potential flaws at the start of a relationship. As a result, we form unrealistic expectations, essentially viewing the person through rose-colored glasses. We neglect to notice issues that could affect the relationship long-term, setting us up for disappointment when these issues eventually surface. When our partner’s flaws start to become more obvious, we feel a sense of disillusionment—and potentially even feel deliberately deceived or misled—causing relationship conflict.

Superficial Social Judgments

Just as the halo effect can impact our relationships, it can also cause us to make superficial social judgments about the various people we encounter on a daily basis. This is most obvious on social media, where the use of beauty filters has been found to amplify the halo effect.¹¹ When we see influencers using these filters and judge them to be attractive, we may also be more likely to perceive them as credible or trustworthy. This can cause us to slip up when critically evaluating their content or neglect to think twice before buying products they recommend. The halo effect can also explain why we are so often shocked when beautiful people exhibit negative traits, as our initial impressions don't prepare us for reality.

Interpreting New Information

This effect can lead to another potentially harmful mental shortcut, confirmation bias, which describes how we tend to prioritize information that aligns with our existing beliefs. While the halo effect informs our immediate perceptions of a person or product, confirmation bias is what keeps those impressions long-lasting. Correspondingly, we seek out information to affirm the existence of positive qualities and misinterpret or dismiss information that suggests we were wrong about our initial judgments, creating an echo chamber of our inaccurate evaluations.

Aside from its negative impact on our individual lives, the halo effect can add up to create systemic challenges. One example of this can be seen in the psychology behind consumer habits. Studies have shown that when the same food products are labeled either “organic” or “conventional,” the “organic” products receive higher ratings and consumers are willing to pay more for them.¹ Health-related labeling or imagery, known as the “health halo” effect, is commonly used in food marketing to increase product sales. This demonstrates how consumers can be manipulated by the halo effect to form inflated impressions of products and subsequently spend more money than necessary.

However, the halo effect is not limited to groceries. Zooming out, we can see how the halo effect can alter our decision-making on everything from employee evaluations to vacation plans. With this in mind, here are some common ways the halo effect can influence larger systems.

In the Workplace

Unfortunately, the halo effect can play a large role in workplace inequality. Research suggests that race, attractiveness, and gender all impact the likelihood of positive or negative evaluations at work. In a meta-analysis comprised of two studies, researchers Xu, Martinez, and Smith found that conventionally attractive people who worked service jobs (ex: hotel customer service, restaurant staff) were rated higher by their customers compared to other employees.⁸ While the awareness that attractiveness plays a role in performance appraisals has been documented since the 1950s, exploring how this may create profound inequality in various domains illuminates the pervasive nature of the halo effect. In favoring others on the basis of outward appearance, we are prone to making uninformed decisions and can miss out on quality employees, political candidates, and products.

Corporate Reputation

The impact of the halo effect on the tourism and hospitality industry is an excellent example of how judgments in one area can color our perception of other traits. According to recent research on a sample of over 21,000 hotels, people’s opinions about hotel attributes—such as cleanliness, services, value, or staff—can influence their ratings of other objectively unrelated attributes, like the hotel’s location.¹² In fact, the results showed that ratings of other attributes explained almost 50% of “location” ratings. 

Note that the halo effect can sometimes be a double-edged sword. The hotel study also revealed a reverse halo effect, where negative impressions about certain hotel attributes had a negative impact on location ratings. Overall, this research suggests that the halo effect can have significant influence on overall impressions of service providers, suggesting that the reputation of these services is vulnerable to isolated negative incidents.¹²

Public Perceptions

Similar to the hotel example above, the reputation halo effect can mislead consumers and inaccurately shape public perceptions about brands. For example, companies with a positive overall reputation tend to be perceived as more environmentally friendly, even if their actual environmental performance is lacking.¹³ This makes it difficult for customers to make buying decisions that genuinely align with their values, and can even discourage companies from making real improvements.

Clearly, the halo effect stands to influence decision-making across various industries and environments. The halo effect also frequently shows up in the realms of healthcare and education—we dive into these effects with two fascinating case studies a little later. While this effect may not pose a threat in all sectors, it is important to be aware of our bias so as to not fall into the trap of stereotyping, or, put classically, “judging a book by its cover.” 

The halo effect is named in connection with the religious symbol. Crowning the heads of saints, a glowing halo bathes their faces in a heavenly light. Fittingly, the halo metaphor illustrates how the effect causes us to think highly of people, often due to their outward appearance, or based on one quality that we value. But why exactly do our brains do this? Let’s take a closer look at the psychological mechanisms behind this mental shortcut.

Constructive and Associative Thinking

The halo effect largely occurs because human social perception is a constructive process. When we form impressions of others, we do not rely solely on objective information. Instead, we actively construct an image that fits in with what we already know, filling in the gaps with assumptions and drawing connections based on what limited information we have. This is commonly known as associative thinking, where the brain connects concepts that seem related by drawing on our initial experiences.¹⁴ The brain does this for one simple reason: it’s efficient. Evaluating every single piece of information about someone takes a lot of time and mental energy, but the halo effect simplifies this judgment process by using one salient trait as a shortcut to form our overall impression.

Cognitive Consistency

Another mechanism at work behind the halo bias is our desire to achieve and maintain cognitive consistency.¹⁴ Typically, we prefer that our opinions, values, behaviors, and attitudes are relatively consistent. When our beliefs clash—for example, we think someone is attractive but not likable—we experience a sense of psychological discomfort known as cognitive dissonance. 

In order to avoid cognitive dissonance and maintain mental harmony, we subconsciously interpret new information in a way that supports our initial impressions of people. For example, when we assume that someone is competent because they’re attractive, we’re more likely to downplay a serious mistake they make at work rather than revise our initial positive perception of them.

Evolutionary Theories

While there are a number of factors that can influence the halo effect, a person’s attractiveness is among the most common characteristics to produce cognitive bias. For instance, research has revealed that attractiveness may affect perceptions tied to life success and personality.² This suggests that evaluations pertaining to attractiveness may influence evaluations for a number of other socially desirable traits, hinting at a possible evolutionary advantage behind this mental heuristic.

Evolutionary theories of the halo effect posit that desirable physical characteristics—like body symmetry and muscularity—are indicators of other qualities that would make someone valuable as a mate, such as health or strength.¹⁵ As a mental shortcut, the halo effect could have helped our ancestors make quick decisions about potential partners by associating attractiveness with these other desirable traits. 

Recent research shows relatively consistent halo effects across various cultures, providing support for this evolutionary theory. For instance, one study examining the effect across 45 countries and 11 world regions found a consistently strong correlation between attractiveness and socially desirable traits.¹⁶ Specifically, faces judged to be more attractive were also thought to be more confident, emotionally stable, intelligent, sociable, trustworthy, and responsible.

Being aware of the halo effect can help us understand how it affects our lives. Whether you are trying to evaluate another person, deciding which political candidate to vote for, or choosing which movie to watch, you should consider how your impressions might affect your evaluations. Though being aware of the halo effect does not eliminate the bias from our lives, it can certainly help to improve our objective decision-making abilities.

When we are making decisions too quickly, or with minimal consideration, the halo effect (amongst other cognitive biases) takes over. When this happens we are less likely to pay attention to contradicting information, and default to information that confirms what we believe is true. The halo effect causes poor decision-making, but more seriously, can lead to prejudice. For instance, if we believe that Ivy League schools produce the most qualified employees, we may have a bias in the interview and view the individual as a perfect fit even if there is an even better candidate who did not attend one of those schools.

While the halo effect may seem like an abstract concept that is hard to actively notice, there are many ways we can attempt to avoid the bias.

Cognitive Debiasing

To minimize the influence of the halo effect, one can look to various cognitive debiasing techniques, such as slowing down one’s reasoning process. For example, if you are aware of the halo effect, you can mitigate the bias by making a conscious effort to discourage character judgments when first meeting someone. Remind yourself that once we gain more information about the person, we can get a more accurate image of who they are. Another tip would be to reduce comparison. When meeting someone, we should try to let them show us who they are, rather than pushing them in a box just because they bear some resemblance to an existing schema.

The halo effect is not solely limited to the way we look at other people. It can also play a role in how we judge things, such as products and brands. For example, if you have a positive impression of a certain brand, you will be more likely to buy products from that brand, even if your impression has no relation to the product’s quality. You should always consider the bias when purchasing products because the highest quality brand, or the best brand for you, may not be the most popular or heavily advertised.

The Horn Effect

Although we should maintain an awareness of the halo effect, we should also look out for when the bias works in reverse—a psychological process called the horn effect. This cognitive bias causes our negative impression of someone or something in one area to change our impression of them in other areas. In the same way that a single positive personality trait can cause us to evaluate someone more favorably, a single negative attribute can shift our judgment in a negative direction. For example, if someone does not like the way a product looks, they might not buy the product despite the potential benefit that it could bring them.

Renowned social psychologists Richard Nisbett and Timothy Wilson documented this negative halo effect in a study conducted in 1977.¹⁷ In the study, participants watched one of two videotaped interviews with a college professor—one in which he was warm and friendly and the other in which he acted cold and distant. Participants who viewed the warm instructor rated his appearance, mannerisms, and accents as appealing, but those viewing the cold professor rated those same traits as irritating. Not only that, but participants viewing the cold professor were adamant that they disliked him because of his irritating traits—they were unaware that it was his cold demeanor that made his overall traits seem less likable. Nisbett & Wilson concluded that this revealed how significantly the halo bias (or reverse halo bias) can influence us outside our level of awareness.

What is the halo effect or “pretty privilege”?

Pretty privilege refers to the societal advantages awarded to people who are deemed conventionally attractive. The concept of pretty privilege is grounded in the halo effect, where a beautiful person is often perceived to possess other positive qualities. For example, not only are attractive individuals thought to be more trustworthy and intelligent, but they’re also perceived as having more moral traits.¹⁸ One 2022 study even found that less attractive and less intelligent-looking people were judged as less human than their more attractive and intelligent-looking counterparts.¹⁹ 

It’s not hard to imagine how this physical attractiveness stereotype can change how society treats people without pretty privilege. Unsurprisingly, those who do not conform to conventional beauty standards frequently face socioeconomic disadvantages. Research shows that attractive defendants tend to receive more lenient sentences from judges, better-looking female servers earn significantly more in tips, and attractive individuals are more likely to be hired, promoted, and receive higher salaries.²⁰  

How does the halo effect relate to the Pygmalion effect?

The Pygmalion effect describes the tendency for high expectations to lead to improved performance. Typically, the effect refers to high expectations that come from someone else rather than ourselves, and how these external expectations alter our behavior and opportunities in ways that fulfill those expectations. Because the halo effect can cause us to form positive impressions of people based on a single positive trait, it can contribute to the positive expectations that drive the Pygmalion effect. For example, a teacher might have higher expectations for a student who is good at math, assuming that they’ll also be good at science. As a result, the teacher ends up giving that student more attention, guidance, and constructive feedback, allowing them to perform well on their science projects.

The same goes for attractive individuals. When attractive people are expected to be smart or charming, they may receive more opportunities to develop their confidence or social skills, which can boost their performance and reinforce the original bias.²⁰ The Pygmalion effect and halo effect often work together in this way, amplifying the advantages awarded to those who are awarded positive impressions. 

The halo effect has had a long history and was illustrated long before it got its name.⁴ In a study conducted in 1907 on the literary merit of authors, Frederick L. Wells had individuals of varying levels of knowledge rank the most prominent authors of the time. The results demonstrated how the overall perceptions of the authors impacted the rankings for some participants.⁷ Following this research, the first explicit demonstration of the halo effect was led by American psychologist Edward L. Thorndike in 1920.

Edward Thorndike’s study, “A Constant Error in Psychological Ratings,” looked at how commanding officers ranked their soldiers on levels of intelligence, technical skill, and reliability. It also examined commanding officers’ evaluations of leadership, physique, and personal qualities like energy, voice, and neatness. Thorndike found that the commanding officers’ judgment was colored by their general feeling about each individual soldier. For example, his study revealed notable correlations for physique with character, physique with intelligence, and physique with leadership, indicating that perceptions of attractiveness may influence evaluations of other traits.

In other words, the commanding officers based their technical assessments on whether or not they believed the soldier to be a good person in general. After replicating these findings in subsequent studies, Thorndike was able to conclude that people are unable to separate their overall general assessments from numerous other characteristics. As a result, an error of judgment emerges that causes people to make false assumptions.³

Most early follow-up research on the halo effect focused on education—for example, exploring its influence on student ratings of teachers.²¹ Later studies explored similar judgments and their consequences, such as the influence of physical attractiveness on teacher expectations. In the 2000s, a wide body of research demonstrated that the halo effect is not just limited to human traits, but extends to a range of societal perceptions, including those associated with groups, ideas, and products.²¹ 

Given that the halo effect has a lot to do with appearance it is heavily linked with product and branding. Firstly, people tend to stick with products that they have already judged to be good. For instance, it is rare that someone uses different brands of technology for their phone, computer, and watch. Typically, once we show loyalty to a brand, it earns that golden halo, making it harder for us to consider alternatives.

Marketing is where companies can really take advantage of the halo effect. By hiring specific public figures to promote their product they may reach a wider audience who will make positive evaluations of the brand. However, not only do recognizable faces sell products, but those who are conventionally attractive will also promote flattering judgements about a given item. For example, if you are in the market for a new pair of running shoes you may favor the brand who features healthy and fit individuals alongside star athletes.

However, good marketing doesn’t always equate to a good product, and in the age of social media, we are flooded with various campaigns all trying to make a unique impression. It is important to slow down in our decision-making in order to be less easily influenced.

If done properly, artificial intelligence can actually help to mitigate the halo effect. To illustrate, certain companies implement AI software to scan job applications and weed out potential candidates from those who may not be qualified. Filtering out certain, bias triggering, information and evaluating based on defined job criteria can help to eliminate human error and the tendency toward the halo effect.⁶ For example, if a particular manager completed their schooling at X university, they may think that others who attended this university share his values and may be biased to believe that they will be the best fit for the role.

It is important to remember that AI software is not completely bias free. Everything from the data it uses to make predictions to the programmers who create the systems can cause biased output. However, this too can be fixed, it is a lot easier to point out bias when we are not the ones perpetrating it. If we catch a system following that same human pattern we can address and correct it.

Unfortunately, a clear example of the halo effect is in the field of medicine. Physicians may sometimes fall into the trap of judging patients based on their appearance without conducting tests first. Additionally, in terms of mental health, the halo effect can also impact our judgment. We might associate someone with a ‘healthy glow’ as someone who is healthy. However, this person could be suffering from a mental illness that cannot be understood without additional conversation and testing. Indeed, some studies have gone so far as to suggest that “attractiveness suppresses the accurate recognition of health.”⁴

The influence of the halo effect on medical diagnoses is not limited to the attractiveness stereotype. In fact, some research suggests that the effect could lead to higher rates of comorbidity in mental health diagnosing—where more than one diagnosis is given to the same patient. This was the inspiration behind a 2010 study where researchers explored the influence of the halo effect on ratings of attention-deficit/hyperactivity disorder (ADHD) and oppositional defiant disorder (ODD) in children with disruptive behaviors.²² 

In the study, researchers presented undergraduate students with four vignettes describing the behavior of an individual child, each respectively describing symptoms of inattention, hyperactivity, oppositionality, and typical behavior. Then, participants were asked to rate the child’s behavior on a scale measuring both ODD and ADHD symptoms. The results showed significant halo effects: both hyperactivity and inattentiveness symptoms were rated significantly higher in the vignette describing oppositional behavior than in the “typical” behavior vignette. In other words, children displaying ODD symptoms were rated with artificially inflated levels of hyperactivity and inattentiveness, suggesting a halo effect that could result in inaccurate comorbid mental health diagnoses.

Another example of the halo effect can be seen in education. Several studies have explored the role of attractiveness on grading, and there is some evidence to suggest that perceived attractiveness can lead to higher grades in school—although there is also evidence suggesting the contrary.⁹ 

Other research has linked name recognition to higher grades in school. A study by H. Harari and J. W. McDavid predicted that teachers’ evaluations of children’s performance would be associated with stereotyped perceptions of the students’ first names. Short essays written by 5th-grade students were evaluated by teachers for the study. The names of the children, however, were replaced by some popular and “attractive” names while others were replaced with rare and “unattractive” names. Overall, the study found that the essays with names that were associated with positive stereotypes received the highest grades. This goes to show that even experienced teachers fall into the halo effect’s trap, leading their preconceived judgments to obscure their grading.⁹

What it is

The halo effect occurs when our positive impressions of people, brands, and products in one area lead us to have positive feelings in another area. This cognitive bias leads us to often cast judgment without having a reason.

Why it happens

The halo effect occurs because human social perception is a constructive process. When we form impressions of others, we do not solely rely on objective information, but we actively construct an image that fits in with what we already know. As a result, our general perceptions of people and things skew our ability to make judgments on other characteristics.

Example #1 - Diagnosing health problems

One example of the halo effect can be found in the field of medicine. Doctors can sometimes assume a patient is healthy because that person appears ‘healthy.’ However, without additional tests, the doctor cannot know for sure that the patient is completely healthy.

Example #2 - Assessment in school

A second example of the halo effect can be seen in education. Research has shown that students with the most attractive physical qualities or the most attractive names receive the highest grades. Even when teachers are experienced, they may still fall into this cognitive trap.

How to avoid it

To minimize the likelihood that you will be influenced by the halo effect, you can look to various cognitive debiasing techniques such as slowing down your reasoning process. For example, it is a good idea to avoid drawing conclusions about someone upon first meeting. Over time, you will be more accurate in your perceptions and be in a better place to make a character judgment.

The Halo Effect in Consumer Perception: Why Small Details Can Make a Big Difference

This article considers how the halo effect can change consumer perception. When creating products, companies should keep in mind that the smallest attribute of a product can change consumers’ perceptions. Similarly, the halo effect can play a role at the brand level where consumers’ perceptions of a certain aspect of a company can lead them to buy more or fewer products.

Developing Organizational Talent: Why Data is Key for Maximizing Returns

When it comes to reallocating and promoting organizational talent, the halo effect can cause us to assume that the top-performing employee in one area (like sales) will also excel in another unrelated area (such as management), even if they have yet to demonstrate specific skills that reflect their fit for this new role. In this article, we explore how employee performance data can help organizations minimize the halo effect when making these decisions and better identify who is best suited for different positions.