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Halo effect

Halo effect is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Halo effect rather than just read about it. In short: The halo effect (sometimes called the halo error), a term coined by Edward Thorndike, is the tendency for positive impressions of a person, company, country, brand, or product in one area to positively influence one's opinion or feelings of a person, company, country, brand, or product in another area. It is "the name given to the phenomenon whereby evaluators tend to be influenced by their previous judgments of per…

Key takeaways

  • Halo effect belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Halo effect to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Halo effect from memory before moving on to harder problems.

Reference excerpt

The halo effect (sometimes called the halo error), a term coined by Edward Thorndike, is the tendency for positive impressions of a person, company, country, brand, or product in one area to positively influence one's opinion or feelings of a person, company, country, brand, or product in another area. It is "the name given to the phenomenon whereby evaluators tend to be influenced by their previous judgments of performance or personality;" in other words, it is a cognitive bias that can prevent people from forming an image based on the sum of all circumstances at hand. A simplified example of the halo effect could be when people, after noticing that an individual in a photograph is attractive, well groomed, and properly attired, then assumes, using a mental heuristic based on the rules of their own social concept, that the person in the photograph is a good person. This constant error in judgment is reflective of the evaluators' preferences, prejudices, ideology, aspirations, and social perception.

Context and applications

Psychology The term halo effect is used in psychology to describe a perception distortion that affects the way people interpret the information about others with whom they have formed a positive gestalt. For example, they find out that someone with whom they have formed a positive gestalt has cheated on his taxes; but because of the positive gestalt, they may dismiss the significance of this behavior or even think the person simply made a mistake. The halo effect refers to the tendency to evaluate an individual positively on many traits because of a shared belief. It is a type of immediate judgment discrepancy, or cognitive bias, in which a person making an initial assessment of another person, place, or thing will assume ambiguous information based on concrete information. The halo effect is an evaluation by an individual and can affect the perception of a decision, action, idea, business, person, group, entity, or other whenever concrete data is generalized or influences ambiguous information. The halo effect can also be explained as the behavior (usually unconscious) of using evaluations based on unrelated criteria to make judgments about something or someone. The halo effect is sometimes used to refer specifically to when this behavior has a positive correlation, such as viewing someone who is attractive as likely to be successful and popular. When this judgment has a negative connotation, however, such as when someone unattractive is more readily blamed for a crime than someone attractive, it is sometimes referred to as the horn effect.

Marketing The term halo effect is used in marketing to explain consumer bias toward certain products because of favorable experience with other products made by the same company. It is used in the part of brand marketing called "line extensions." One common halo effect is when the perceived positive features of a particular item extend to a broader brand. A notable example is the manner in which the popularity of Apple's iPod generated enthusiasm for the corporation's other products. Advertising often makes use of television shows, movies and those who star in them, to promote products via the halo effect. In the automotive industry, exotic, limited-production luxury models or low-volume sports cars made by a manufacturer's racing, motorsports, or in-house modification teams, are sometimes referred to as "halo cars" for the effect they are intended to produce on selling other vehicles within the make. To contrast this with the automotive terminology "flagship model" (see flagship car). In the wine industry, certain wine features create a halo effect that can influence the customer's opinion of a given wine. The inclusion of the category "organic" on the label of a wine can increase the consumer's positive valuation of the wine. Organic wines are conceived of as being healthy, having a better taste, scent, and color, and resulting in a higher degree of overall satisfaction. Another example of the halo effect in the wine industry is the association of traditional corks with wine quality: corked bottles are systematically rated as of higher quality than bottles that use screw caps and plastic caps since the latter are viewed as signifiers of low-quality wines. Advertising in one channel has been shown to have a halo effect on advertising in another channel. A halo effect with regard to health, dubbed a "health halo," is used in food marketing to increase sales of a product; it can result in increased consumption of the product in the halo, which may be unhealthy. The term "halo effect" has also been applied to human rights organizations that have used their status to move away from their stated goals. Political scientist Gerald Steinberg has claimed that non-governmental organizations (NGOs) take advantage of the halo effect and are "given the status of impartial moral watchdogs" by governments and the news media. The Ronald McDonald House, a widely known NGO, openly celebrates the positive outcomes it receives from the halo effect. The web page for the Ronald McDonald House in Durham, North Carolina, states that 95% of survey participants were aware of Ronald McDonald House Charities. This awareness is attributed to the halo effect, as employees, customers, and stakeholders are more likely to be involved in a charity that they recognize and trust, with a name and logo that are familiar. A brand's halo effect can protect its reputation in the event of a crisis. An event that is detrimental to a brand that is viewed favorably would not be as threatening or damaging to a brand that consumers view unfavorably.

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Halo effect

Start with the simplest possible case. Write down what Halo effect claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Halo effect before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Halo effect ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Halo effect

In research
Halo effect appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Halo effect in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Halo effect is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1920 introductions, Cognitive biases, Educational psychology, so understanding it makes those chapters shorter.
In everyday life
Look for Halo effect outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Halo effect in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Halo effect means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Halo effect out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Halo effect in simple terms?

The halo effect (sometimes called the halo error), a term coined by Edward Thorndike, is the tendency for positive impressions of a person, company, country, brand, or product in one area to positively influence one's opinion or feelings of a person, company, country, brand, or product in another a…

Why does Halo effect matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Halo effect?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Halo effect.

Tags

  • 1920 introductions
  • Cognitive biases
  • Educational psychology
  • Error

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