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Identifiable victim effect

Identifiable victim effect 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 Identifiable victim effect rather than just read about it. In short: The identifiable victim effect is the tendency of individuals to offer greater aid when a specific, identifiable person ("victim") is observed under hardship, as compared to a large, vaguely defined group with the same need. The identifiable victim effect has two components.

Key takeaways

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

Reference excerpt

The identifiable victim effect is the tendency of individuals to offer greater aid when a specific, identifiable person ("victim") is observed under hardship, as compared to a large, vaguely defined group with the same need. The identifiable victim effect has two components. People are more inclined to help an identified victim than an unidentified one, and people are more inclined to help a single identified victim than a group of identified victims. Although helping an identified victim may be commendable, the identifiable victim effect is considered a cognitive bias. From a consequentialist point of view, the cognitive error is the failure to offer N times as much help to N unidentified victims. The identifiable victim effect has a mirror image that is sometimes called the identifiable perpetrator effect. Research has shown that individuals are more inclined to mete out punishment, even at their own expense, when they are punishing a specific, identified perpetrator. The conceptualization of the identifiable victim effect as it is known today is commonly attributed to American economist Thomas Schelling. He wrote that harm to a particular person invokes "anxiety and sentiment, guilt and awe, responsibility and religion, [but]…most of this awesomeness disappears when we deal with statistical death". Historical figures from Joseph Stalin to Mother Teresa are credited with statements that epitomize the identifiable victim effect. The remark "One death is a tragedy; a million deaths is a statistic" is widely, although incorrectly, attributed to Stalin. The remark "If I look at the mass I will never act. If I look at the one, I will," is attributed to Mother Teresa.

Examples This article mentions many historical incidents that have been cited as examples of the identifiable victim effect. These incidents serve as illustrative examples but do not constitute evidence that the effect exists.

Arrest of Rosa Parks The conviction of Rosa Parks in 1955 for refusing to give up her bus seat in favor of a White passenger inspired the Black community to boycott the Montgomery, Alabama buses for over a year. Parks appealed her conviction, but her case never reached the U.S. Supreme Court. The Court found bus segregation unconstitutional in Browder v. Gayle, a case with four plaintiffs. Parks remains a symbol of resistance to racial segregation in the United States, while the four Browder v. Gayle plaintiffs are much less well known.

'Baby Jessica' in the well On October 14, 1987, 18-month old Jessica McClure fell into a narrow well in her aunt's backyard in Midland, Texas. Within hours, 'Baby Jessica', as she became known, made headlines around the US. The public reacted with sympathy towards her ordeal. While teams of rescue workers, paramedics and volunteers worked to successfully rescue 'Baby Jessica' in 58 hours, the public donated hundreds of thousands of dollars to her family. Even after Jessica was discharged from the hospital, the McClure family was flooded with cards and gifts from members of the public as well as a visit from then-Vice President George H.W. Bush and a telephone call from then-President Ronald Reagan.

Drowning of Alan Kurdi In September, 2015, three-year-old Syrian refugee Alan (or Aylan) Kurdi drowned when he and his family tried to reach Europe by boat. A photograph of Kurdi's body caused a dramatic upturn in international concern over the refugee crisis. The picture has been credited with causing a surge in donations to charities helping migrants and refugees, with one charity, the Migrant Offshore Aid Station, recording a 15-fold increase in donations within 24 hours of its publication.

Murder of George Floyd The murder of George Floyd by a police officer in May, 2020 led to worldwide protests against police brutality. Almost 1,000 people are killed in the U.S. by police every year, and a black male is 2.5 times as likely to be killed by police as a white male. However, people tend to be upset with specific instances of suffering, rather than larger trends.

Strength of the effect

Meta-analysis of experimental evidence A meta-analysis of studies through 2015 of the identifiable victim effect found that not all studies achieve statistical significance, and the effect size, in general, is small. In an experiment more recent than the meta-analysis, identifying a victim in COVID-19 messaging had no meaningful effect on pro-health behaviors such as hand-washing, mask-wearing, and staying at home. On the other hand, extremely subtle experimental manipulations may yield significant effects. For example, Small and Loewenstein found that when the victim is identified only by a number, subjects are more inclined to help the victim if they know the victim's number when they decide whether to help than if they learn the number later. The meta-analysis found that statistical significance is enhanced and the effect size is increased under the following circumstances:

if the identified victim is a child if a photograph of the victim is shown if the victim's plight is caused by poverty rather than disease or injury if the victim is perceived as not responsible for his/her plight

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Identifiable victim effect

Start with the simplest possible case. Write down what Identifiable victim effect 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 Identifiable victim 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 Identifiable victim 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 Identifiable victim effect

In research
Identifiable victim effect 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 Identifiable victim 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
Identifiable victim effect is common in secondary-school and first-year university syllabi. It links to neighbouring topics Behavioral finance, Cognitive biases, Giving, so understanding it makes those chapters shorter.
In everyday life
Look for Identifiable victim 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 Identifiable victim effect in 20 minutes

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

Frequently asked questions

What is Identifiable victim effect in simple terms?

The identifiable victim effect is the tendency of individuals to offer greater aid when a specific, identifiable person ("victim") is observed under hardship, as compared to a large, vaguely defined group with the same need. The identifiable victim effect has two components.

Why does Identifiable victim effect 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 Identifiable victim 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 Identifiable victim effect.

Tags

  • Behavioral finance
  • Cognitive biases
  • Giving
  • Moral psychology
  • Social problems in medicine

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