Supporting Evidence
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ISEE Upper Level: Reading Comprehension › Supporting Evidence
Which piece of evidence best supports the author's main argument?
The author argues that Florence Nightingale’s impact on medicine came as much from statistics as from bedside care. While she is often remembered for nursing wounded soldiers during the Crimean War (1853–1856), the author concludes that her most lasting contribution was persuading governments to reform sanitation through data. The passage explains that poor ventilation, contaminated water, and overcrowding caused preventable deaths in military hospitals.
The author cites Nightingale’s reports to British officials after the war, which included carefully organized mortality figures. She used visual charts, including the famous “coxcomb” diagrams, to show that disease killed far more soldiers than battlefield injuries. Secondary historians quoted in the passage argue that these clear comparisons made it difficult for policymakers to ignore the problem. As reforms were implemented, hospital death rates declined, supporting the author’s claim that data-driven advocacy produced measurable change.
The passage also notes that Nightingale’s approach influenced later public health efforts. By treating sanitation as a matter of evidence and administration, she helped establish a model for reforms that could be evaluated. Therefore, the author concludes that Nightingale should be understood as a pioneer of applied statistics in service of human welfare.
Secondary historians note that policymakers found Nightingale’s visual charts difficult to ignore afterward.
The author states that poor ventilation, contaminated water, and overcrowding caused preventable hospital deaths.
Nightingale’s charts showed disease killed more soldiers than injuries, and reforms were followed by declining death rates.
The Crimean War lasted from 1853 to 1856 and involved major European powers in military conflict.
Explanation
This question tests ISEE Upper Level reading comprehension skills, specifically the ability to select evidence that supports a conclusion. In reading comprehension, identifying supporting evidence involves determining which details directly uphold the main argument or conclusion. This requires understanding the text's logical structure and the role of each piece of information. In the passage, the author presents the argument that Nightingale's statistical advocacy reformed sanitation, and provides evidence such as charts showing disease deaths and subsequent declines. The correct answer, Choice B, is correct because it directly supports the author's conclusion by linking data to reforms and outcomes. This choice aligns with the main argument by emphasizing statistics' impact. Choice C is incorrect because it describes causes without reform evidence. This error often occurs when students select problems over solutions. To help students: Encourage them to map the argument structure and note how each piece of evidence fits. Practice identifying evidence that directly supports conclusions in various texts. Watch for: focusing on irrelevant details or opinions instead of logical support.
Which evidence best supports the argument that urban design choices directly contribute to elevated city temperatures?
Cities with extensive green spaces and reflective building materials show significantly reduced heat island effects compared to other cities.
Measurements in Phoenix show downtown temperatures can be up to 9°C higher than surrounding desert during summer nights.
Cities typically experience temperatures 2-5°C higher than surrounding rural areas due to several interconnected development factors.
Dark surfaces like asphalt roads and concrete buildings absorb more solar radiation than natural vegetation throughout the day.
Explanation
When you encounter a question asking for the "best evidence" to support a specific argument, you need to identify which option most directly demonstrates the cause-and-effect relationship described in the question stem. Here, you're looking for evidence that urban design choices directly contribute to elevated temperatures.
Option C provides the strongest evidence because it shows a direct comparison between different urban design approaches and their temperature outcomes. Cities with green spaces and reflective materials have reduced heat island effects compared to cities without these features. This demonstrates that specific design choices directly influence temperature differences—exactly what the question asks you to prove.
Option A is wrong because it only states that cities are warmer than rural areas without connecting this to specific design choices. It mentions "interconnected factors" but doesn't identify what those design decisions are.
Option B is incorrect because while it explains one mechanism (dark surfaces absorbing heat), it doesn't provide evidence that design choices matter. It simply describes what happens with dark surfaces versus vegetation without showing that cities could choose differently.
Option D fails because it only provides a measurement of temperature difference in one city. This data shows the heat island effect exists but doesn't demonstrate that urban design choices cause these differences—Phoenix could be hot for many reasons.
For reading comprehension questions about evidence and argumentation, look for answer choices that show clear cause-and-effect relationships or comparisons that isolate the factor mentioned in the question. The best evidence directly connects the proposed cause to the observed effect.
Which piece of evidence from the passage best supports the conclusion that Colony Collapse Disorder has a complex, multi-factorial cause?
Colony Collapse Disorder was first documented in 2006 and has particularly puzzled researchers since then.
Recent studies suggest that CCD results from a complex interaction of multiple stressors rather than a single factor.
Scientists have identified several factors contributing to bee population decline, including habitat loss and pesticide use.
Some researchers argue that varroa mites weaken bee immune systems and make colonies more susceptible to threats.
Explanation
When you encounter reading comprehension questions asking for evidence that "best supports" a conclusion, you need to find the statement that most directly backs up the specific claim being made.
The conclusion states that Colony Collapse Disorder has a "complex, multi-factorial cause." Choice A directly supports this by explicitly stating that "recent studies suggest that CCD results from a complex interaction of multiple stressors rather than a single factor." This sentence uses nearly identical language to the conclusion—"complex interaction of multiple stressors" clearly indicates multi-factorial causation.
Choice B is incorrect because it only tells us when CCD was discovered and that it puzzled researchers. While being "puzzled" might suggest complexity, this doesn't provide evidence about multiple causes. Choice C is wrong because it discusses factors contributing to general bee population decline, not specifically to CCD. The passage treats CCD as a distinct phenomenon within the broader decline. Choice D mentions one specific theory about varroa mites, but discussing a single potential cause doesn't support the idea of multi-factorial causation—if anything, it points toward one factor.
The key trap here is confusing evidence about bee decline in general with evidence about CCD specifically. The passage clearly distinguishes between the broader environmental factors affecting all bees and the mysterious, complex phenomenon of CCD.
For ISEE reading questions, always match the scope of the evidence to the scope of the conclusion. If the question asks about a specific phenomenon, make sure your evidence directly addresses that phenomenon, not a broader category.
Which evidence from the passage best supports the argument that jazz represented a fundamental break from European musical conventions?
By the 1930s, jazz had evolved into big band swing music with both intimate and large-scale arrangements.
Early jazz musicians like Buddy Bolden and Jelly Roll Morton began experimenting with innovative syncopated rhythms.
The migration of musicians from New Orleans to Chicago and New York spread jazz innovations nationwide.
Jazz emphasized improvisation and spontaneous musical conversation between performers rather than formal written structures.
Explanation
When you encounter questions asking for evidence that "best supports" an argument, you need to identify which piece of evidence most directly proves the central claim. Here, the argument is that jazz represented a "fundamental break" from European musical conventions.
Choice A provides the strongest evidence because it establishes a direct contrast between jazz and European classical traditions. The passage explicitly states that classical music "relied heavily on written notation and formal structure" while jazz "emphasized improvisation and spontaneous musical conversation." This comparison shows the fundamental philosophical difference between the two musical approaches - one rigid and predetermined, the other fluid and creative in real-time.
Choice B is incorrect because while syncopated rhythms were innovative, this detail describes a specific technical element rather than proving a fundamental philosophical departure from European traditions. Choice C is wrong because geographic spread doesn't demonstrate how jazz differed from European conventions - it only shows where jazz traveled. Choice D fails because describing jazz's evolution into different formats doesn't prove it broke from European traditions; orchestral arrangements might actually suggest some similarity to European practices.
The key trap here is confusing supporting details with primary evidence. Choices B, C, and D all provide interesting information about jazz, but they don't directly contrast jazz with European musical traditions.
When you see "best supports" questions, look for the evidence that most directly addresses the specific claim being made. Often, the strongest evidence will contain explicit comparisons or contrasts that prove the argument rather than just describing related details.
What evidence most directly supports the conclusion that dreaming is essential for cognitive and emotional health?
Studies show that students who dream about study material perform better on tests than those who don't report such dreams.
During REM sleep, the brain appears to transfer information from short-term memory to long-term memory storage.
Brain imaging studies reveal that the prefrontal cortex shows decreased activity while the limbic system becomes highly active during dreams.
Patients with REM sleep disorders experience significantly reduced dreaming and often show impaired learning abilities and stress management.
Explanation
When you encounter questions asking for evidence that "most directly supports" a conclusion, you need to identify which piece of evidence creates the strongest cause-and-effect relationship with the claimed outcome.
The passage concludes that dreaming is essential for cognitive and emotional health. Choice B provides the most direct evidence because it shows what happens when dreaming is reduced: patients with REM sleep disorders (who dream significantly less) demonstrate impaired learning and stress management problems. This creates a clear link—less dreaming leads to worse cognitive and emotional functioning, strongly suggesting dreaming is essential for these processes.
Let's examine why the other choices are less direct. Choice A describes brain activity patterns during dreams but doesn't demonstrate that this activity is essential—it only shows what happens, not why it's necessary. Choice C explains one function of REM sleep (memory transfer) but doesn't prove this process is essential or link it to overall cognitive health. Choice D shows a correlation between dreaming about study material and test performance, but this is limited to one specific scenario and doesn't address broader cognitive or emotional health.
The key difference is that choice B uses a "deprivation study" approach—showing negative consequences when something is removed or reduced. This type of evidence most directly demonstrates necessity because it reveals what happens without the factor in question.
Remember: when looking for evidence that something is "essential," prioritize studies showing problems that occur in its absence over studies that simply describe how it works.
Which evidence best supports the claim that the printing press democratized access to knowledge in European society?
Before the printing press, books were hand-copied by scribes and could cost as much as a farmer's annual income.
Publishers chose to print in vernacular languages rather than Latin to reach broader audiences across Europe.
The explosion in available texts led to increased literacy rates among the middle class and artisan populations.
By 1500, an estimated 15 to 20 million books had been printed—more than in the previous thousand years combined.
Explanation
When you encounter a question asking for evidence that "best supports" a claim, you need to identify which piece of evidence most directly proves the stated assertion. Here, the claim is that the printing press "democratized access to knowledge"—meaning it made knowledge available to ordinary people, not just elites.
Choice C provides the strongest evidence because it directly shows the democratic impact: "increased literacy rates among the middle class and artisan populations." This explicitly demonstrates that knowledge spread beyond the wealthy elite to everyday working people, which is exactly what democratization means.
Let's examine why the other choices fall short. Choice A describes the problem before the printing press but doesn't prove the press solved it—it sets up the "before" without showing the "after." Choice B gives impressive production numbers but doesn't tell us who had access to these books; millions of books could theoretically still be limited to wealthy buyers. Choice D shows publishers targeted broader audiences, but this represents intent rather than actual democratic results—we don't know if common people actually gained access.
Notice the difference between showing potential for change versus proving actual change occurred. Choices A, B, and D all relate to the democratization process, but only C provides concrete evidence that ordinary people actually gained access to knowledge through increased literacy.
For reading comprehension questions asking for "best evidence," always look for the choice that most directly proves the claim rather than just relating to it. Evidence should show results, not just circumstances or intentions.
Which evidence best supports the argument that rapid industrialization directly caused urban health crises in 19th-century cities?
The 1854 cholera outbreak in London's Soho district killed over 600 people in just ten days from contaminated water.
Cities that implemented sanitary reforms by the 1870s showed dramatically reduced mortality rates compared to other cities.
Housing shortages forced working families into overcrowded tenements without running water or adequate sanitation facilities.
Manchester's population grew from 75,000 residents in 1801 to over 300,000 by 1851 due to factory employment.
Explanation
When you encounter questions asking for evidence that supports a cause-and-effect relationship, focus on finding the answer choice that demonstrates the clearest direct connection between the cause and its consequences.
The question asks which evidence best shows that rapid industrialization directly caused urban health crises. The key word here is "directly" - you need evidence that shows industrialization leading to conditions that immediately created health problems. Choice B provides this direct causal link: housing shortages (caused by rapid population growth from industrialization) forced families into overcrowded tenements without running water or sanitation, which directly created the unsanitary conditions that bred disease.
Choice A shows population growth due to factory employment, but this only demonstrates the scale of urbanization, not how it caused health crises. It's missing the crucial connection to actual health problems. Choice C describes a specific disease outbreak with contaminated water, but this is an example of a health crisis rather than evidence of what caused such crises generally. Choice D discusses the solution to health problems through sanitary reforms, but evidence of how problems were solved doesn't prove what originally caused them.
Remember that on reading comprehension questions about cause and effect, the strongest evidence will show the complete causal chain. Look for answer choices that connect the stated cause to its immediate consequences, rather than just showing examples of the cause or effect in isolation. The word "directly" in questions is your clue to find the most immediate causal relationship.
What evidence most clearly demonstrates that mental shortcuts can lead to flawed decision-making in real-world situations?
The availability heuristic causes people to estimate event likelihood based on how easily they can remember similar occurrences.
Real estate agents use anchoring effects by showing overpriced houses first to make subsequent properties seem reasonably priced.
People typically overestimate airplane crash probability because media coverage makes such events memorable, despite flying being safer than driving.
Social media algorithms exploit confirmation bias by showing users content that aligns with their previous interests and established opinions.
Explanation
When you encounter questions about evidence and examples in reading comprehension, look for the choice that best illustrates the main point through concrete, measurable consequences.
Choice A provides the strongest evidence of flawed decision-making because it shows a clear disconnect between perception and reality with measurable consequences. People overestimate airplane crash probability due to memorable media coverage, even though statistical data proves flying is safer than driving. This demonstrates how the availability heuristic leads to objectively incorrect risk assessments that could influence important decisions like travel choices.
Choice B describes how algorithms exploit confirmation bias but doesn't demonstrate that this leads to flawed decisions—it only shows how the bias is used. Choice C explains how real estate agents use anchoring effects strategically, but this represents intentional manipulation rather than evidence that the mental shortcut itself causes flawed judgment. Choice D simply defines the availability heuristic without providing concrete evidence of poor decision-making outcomes.
The key difference is that A shows people making demonstrably wrong judgments (overestimating airplane danger despite contrary evidence), while the other choices either explain mechanisms without showing flawed outcomes or describe intentional exploitation of biases rather than accidental poor judgment.
For reading comprehension questions asking for "evidence" or "examples," prioritize choices that show clear cause-and-effect relationships with measurable, real-world consequences. Look for answers where you can point to objective data proving the decision-making was actually flawed, not just different or influenced.
Which evidence best supports the conclusion that human behavior, rather than natural evolution alone, has accelerated antibiotic resistance?
Methicillin-resistant Staphylococcus aureus emerged within just two decades of the antibiotic's introduction to medical practice.
The World Health Organization predicts that drug-resistant infections could cause 10 million deaths annually by 2050.
Patients often stop taking prescribed antibiotics once they feel better, rather than completing the full treatment course.
In many countries, antibiotics are available without prescription, leading to unnecessary use for viral infections.
Explanation
When you encounter reading comprehension questions asking for evidence to support a specific conclusion, you need to identify which piece of information most directly proves the stated claim. Here, you're looking for evidence that human behavior has accelerated antibiotic resistance beyond what natural evolution alone would cause.
Choice B provides the strongest evidence because it describes a specific human behavior—making antibiotics available without prescription—and directly links it to a consequence that accelerates resistance: "leading to unnecessary use for viral infections." This shows humans creating conditions that speed up resistance development beyond natural rates, since using antibiotics against viruses (where they're ineffective) provides no medical benefit but still exposes bacteria to the drugs, promoting resistance.
Choice A describes the timeline of MRSA emergence but doesn't distinguish between natural evolution and human-accelerated processes—bacteria could theoretically evolve resistance naturally within two decades. Choice C mentions patient behavior (stopping treatment early) but doesn't explicitly connect this to acceleration of resistance, though it's implied. Choice D presents a future prediction about deaths, which doesn't serve as evidence for how human behavior has accelerated the problem.
The key difference is that B explicitly states both the human behavior (unnecessary availability and use) and its accelerating effect on resistance development. It's the most direct cause-and-effect evidence linking human actions to faster resistance.
For reading comprehension questions asking for supporting evidence, look for the choice that most explicitly connects the cause mentioned in the question to a clear effect described in the passage.
What evidence most strongly supports the conclusion that the placebo effect involves genuine physiological changes rather than just psychological perception?
Patients who receive more personal attention from healthcare providers typically show stronger placebo responses than those with minimal interaction.
Brain imaging studies reveal that placebo treatments can trigger endorphin release and activate the same neural pathways as medications.
Cultural expectations influence placebo responses, with German patients showing stronger responses to herbal treatments than other populations.
The perceived credibility of treatment matters, with injections producing stronger placebo effects than pills in clinical studies.
Explanation
When you encounter reading comprehension questions asking for evidence that "most strongly supports" a conclusion, you need to identify which piece of information provides the most direct, concrete proof of the claim being made.
The question asks what evidence best proves that placebo effects involve actual physiological changes, not just psychological perception. Answer choice A provides the strongest evidence because brain imaging studies offer objective, measurable proof of biological processes. When the passage states that "placebo treatments can trigger the release of endorphins and activate the same neural pathways as actual medications," this demonstrates real, observable changes in brain chemistry and function—not just patients feeling better psychologically.
Answer choice B describes how personal attention affects placebo strength, but this doesn't prove the changes are physiological rather than psychological. Answer choice C explains that treatment credibility influences placebo effects, which could still be explained by psychological factors alone—patients might simply feel better because they believe the treatment is more legitimate. Answer choice D discusses cultural expectations affecting responses, but again, this points more toward psychological influences rather than proving genuine biological changes.
The key distinction here is between correlation and direct evidence. While B, C, and D show factors that influence placebo effects, only A provides concrete biological evidence that measurable physiological processes are actually occurring.
For ISEE reading questions asking for "strongest evidence," always look for the most direct, objective proof rather than supporting details or correlational information.