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Herd behavior

Herd behavior is a biology 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 Herd behavior rather than just read about it. In short: Herd behavior is the behavior of individuals in a group acting collectively without centralized direction. The term refers to behavior in animals in herds, packs, bird flocks, fish schools, etc.

Key takeaways

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

Reference excerpt

Herd behavior is the behavior of individuals in a group acting collectively without centralized direction. The term refers to behavior in animals in herds, packs, bird flocks, fish schools, etc. Voting, demonstrations, riots, general strikes, sporting events, religious gatherings, everyday decision-making, judgement, and opinion-forming – may include human herd behavior.

Early research The philosophers Søren Kierkegaard and Friedrich Nietzsche were among the first to criticize what they referred to as "the crowd" (Kierkegaard) and "herd morality" and the "herd instinct" (Nietzsche) in human society. Modern psychological and economic research has identified herd behavior in humans to explain the phenomenon of large numbers of people acting in the same way at the same time. The British surgeon Wilfred Trotter popularized the "herd behavior" phrase in his book, Instincts of the Herd in Peace and War (1914). In The Theory of the Leisure Class, Thorstein Veblen explained economic behavior in terms of social influences such as "emulation", where some members of a group mimic other members of higher status. In "The Metropolis and Mental Life" (1903), early sociologist George Simmel referred to the "impulse to sociability in man", and sought to describe "the forms of association by which a mere sum of separate individuals are made into a 'society' ". Other social scientists explored behaviors related to herding, such as Sigmund Freud (crowd psychology), Carl Jung (collective unconscious), Everett Dean Martin (Behavior of Crowds) and Gustave Le Bon (the popular mind). Swarm theory observed in non-human societies is a related concept and is being explored as it occurs in human society. Scottish journalist Charles Mackay identifies multiple facets of herd behavior in his 1841 work, Extraordinary Popular Delusions and the Madness of Crowds.

Everyday decision making "Benign" herding behaviors may occur frequently in everyday decisions based on learning from the information of others, as when a person on the street decides which of two restaurants to dine in. Suppose that both look appealing, but both are empty because it is early evening; at random, this person chooses restaurant A. Soon a couple walks down the same street in search of a place to eat. They see that restaurant A has customers while B is empty, and choose A on the assumption that having customers makes it the better choice. If other passers-by do the same thing during the evening, restaurant A does more business that night than B. This phenomenon is also referred as an information cascade.

Crowds

Crowds that gather to protest about a grievance can involve herding behavior that turns violent, particularly when confronted by an opposing ethnic or racial group. The Los Angeles riots of 1992, New York Draft Riots, and Tulsa race massacre are notorious in U.S. history. The idea of a "group mind" or "mob behavior" was put forward by the French social psychologists Gabriel Tarde and Gustave Le Bon.

Sheeple Sheeple (; a portmanteau of "sheep" and "people", also spelt sheople) is a derogatory term that highlights the passive herd behavior of people easily controlled by a governing power or market fads by comparing them to sheep, a herd animal that is "easily" led about. The term is used to describe those who voluntarily acquiesce to a suggestion without any significant critical analysis or research, in large part due to the majority of a population having a similar mindset. Word Spy defines it as "people who are meek, easily persuaded, and tend to follow the crowd (sheep + people)". Merriam-Webster defines the term as "people who are docile, compliant, or easily influenced: people likened to sheep". The word is pluralia tantum, which means it does not have a singular form. The word was used in 1945, by W. R. Anderson in his column Round About Radio, where he wrote:

The simple truth is that you can get away with anything, in government. That covers almost all the evils of the time. Once in, nobody, apparently, can turn you out. The People, as ever (I spell it "Sheeple"), will stand anything. Another instance of early use was by Ernest Rogers, whose 1949 book The Old Hokum Bucket contained a chapter entitled "We the Sheeple". The Wall Street Journal first reported the label in print in 1984; the reporter heard the word used by the proprietor of the American Opinion bookstore. In this usage, taxpayers were derided for their blind conformity as opposed to those who thought independently. The term was first popularized in the late 1980s and early 1990s by conspiracy theorist and broadcaster Bill Cooper on his radio program The Hour of the Time.

Economics

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Herd behavior

Start with the simplest possible case. Write down what Herd behavior claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In biology, 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 Herd behavior 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 Herd behavior 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 Herd behavior

In research
Herd behavior appears in biology 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 Herd behavior 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
Herd behavior is common in secondary-school and first-year university syllabi. It links to neighbouring topics Behavioral ecology, Crowd psychology, Group processes, so understanding it makes those chapters shorter.
In everyday life
Look for Herd behavior 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 Herd behavior in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Herd behavior 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 Herd behavior out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Herd behavior in simple terms?

Herd behavior is the behavior of individuals in a group acting collectively without centralized direction. The term refers to behavior in animals in herds, packs, bird flocks, fish schools, etc.

Why does Herd behavior matter?

Because it connects several biology 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 Herd behavior?

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 Herd behavior.

Tags

  • Behavioral ecology
  • Crowd psychology
  • Group processes
  • Herding

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