MCAT content library / CARS reading & reasoning / CARS passage walkthrough: education and measurement
Separate description from evaluation and test whether a new institutional example preserves the author’s mechanism.
About 18 minutes, including the worked examples and checks.
Useful foundations
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Read the argument before judging the policy
This original passage supplies the information needed for all four checks. Treat the school as an imagined case and use the author’s reasoning rather than outside beliefs about testing. CARS asks you to evaluate and extend supplied arguments.1
Read the passage, then attempt the checks before the walkthrough if you want an initial independent attempt.
Original passage: when a measure becomes a rule
1. The trustees of an imagined school wanted to know whether its reading program was working. Teachers described conversations, abandoned interpretations, and the moment a student returned to an earlier chapter with a different question. These accounts were illuminating, but they were difficult to compare across classrooms. The trustees therefore requested one number: books completed per student. The request was not foolish. A count can reveal that opportunities offered to some students are absent for others. What would be foolish is to forget, once a useful count exists, why the activity was worth counting.
2. At first the number served as a prompt for inquiry. A classroom with few completed books might have lacked suitable materials, or its students might have spent unusually long discussing a demanding work. Later, the count became the principal basis for public recognition and access to new classroom resources. Teachers learned which books could be finished quickly, and students learned that rereading an unresolved chapter delayed the next recorded accomplishment. The count became more uniform at precisely the moment the activity it represented became less varied. This was no conspiracy against reading. It was an intelligible response to what the institution now rewarded.
3. Critics of the policy argued that reading cannot be measured. That conclusion was too convenient. It would permit a school to celebrate rich experiences while neglecting students who scarcely encountered a book at all. The difficulty was not that a numerical description had entered a human activity. It was that one description had acquired authority over the activity’s other purposes. A measure used to identify a question had become a rule for settling it. Once high counts supplied their own justification, asking what kind of reading produced them could appear to be an attack on achievement itself.
4. A revised program might retain the count while examining several forms of evidence: access to books, sustained engagement with difficult passages, the reasons students choose to reread, and their ability to explain a changed interpretation. Additional measures would not be automatically superior. If every form of evidence became another rewarded target, the school could simply create a more elaborate contest. The point is to preserve opportunities for evidence to challenge the institution’s preferred description. A teacher’s account should be answerable to observed activity, and a number should be answerable to the purpose that makes it relevant.
5. This arrangement requires judgment and can produce disagreement. A school cannot avoid responsibility for evaluating reading merely by choosing a count, nor can it avoid it by renouncing counts. It must decide what different observations mean together and revise those decisions when they fail to explain the activity. The trustees’ initial question was legitimate: are students receiving the education we promise? The eventual mistake was to let an instrument for investigating that question become a substitute for asking it. An institution preserves a measure’s usefulness by retaining the ability to discover that, on a particular occasion, the measure is telling an incomplete story.
Worked reading: distinguish description from evaluation
Paragraph 2 describes a change in the count’s institutional role: it first prompts questions, then governs recognition and resources. The author supplies a mechanism for the later behavioral change: participants respond to what is rewarded. The description is not an endorsement of those incentives. Nor does the author portray teachers as conspiring to deceive the trustees.
Paragraph 3 rejects a different response, the claim that reading cannot be measured. This is a crucial turn. If a reader paraphrases the passage as “numbers ruin education,” the paraphrase loses the author’s concern that abandoning measurement could conceal unequal opportunities. The passage criticizes dominance by one description while preserving the value of evidence and accountability.
For a function question about paragraph 3, Prioritize the paragraph’s role, Paraphrase it as a correction to an overreaction, and Prognose an answer that limits the preceding criticism. Pick the matching structural description. In the Post-mortem, check whether a wrong choice confused the position being criticized with the author’s own position.
Track the proposed remedy and its limits
The fourth paragraph proposes evidence that can challenge a favored account. It also anticipates a failure of the remedy: adding more rewarded targets can reproduce the original problem. The author therefore does not simply replace one-number evaluation with a guaranteed superior many-number evaluation. The relationship between evidence and judgment remains central.
When evaluating an analogy, identify the original structure: an institution chooses a proxy, rewards it, and risks mistaking success on that proxy for success at the underlying purpose. A hospital, museum, or public service can supply a new setting if the relevant relationship is specified. The title of the institution is not the basis of the analogy; the mechanism and the role of counterevidence are.2
ACTIVE PRACTICE · CARS ARGUMENT ANALYSIS
Follow a Measure as It Becomes a Rule
Use only the original five-paragraph school passage. The author does not reject counts; the argument concerns how an informative count can become an incentive that distorts the activity it was intended to describe.
Reveal the Five-Paragraph Argument Map
- A useful measure can reveal missed opportunities but must remain answerable to purpose.
- The measure becomes a reward that predictably changes reader and teacher behavior.
- The author rejects the opposite extreme of abandoning measurements.
- A better approach uses different evidence that can challenge institutional judgments, without turning all evidence into rewarded targets.
- Evaluation requires accountable judgment; measures should not substitute for asking the original question.
The transfer scenario is hypothetical; the decision should follow the author’s distinction between a useful description and its purpose, not outside opinions on school or hospital policy.
Check your reasoning
Choose an answer before opening its feedback. Each option explains the reasoning behind that choice.
Check 1
Which policy would the author most likely support?
A. Abandon numerical evidence because it cannot capture the full meaning of reading.
Review this choice. Paragraph 3 rejects this overreaction and emphasizes what counts can reveal.
B. Allow the completion count to determine resource allocation whenever it is reliably recorded.
Review this choice. Reliability of recording does not settle whether the count adequately represents educational purposes.
C. Combine evidence in a process that permits the preferred measure’s relevance to be challenged.
Correct. The proposed remedy preserves evidence and judgment while allowing incomplete descriptions to be questioned.
D. Replace one completion target with several targets and treat their total as a complete evaluation.
Review this choice. Paragraph 4 warns that adding rewarded targets can recreate the same problem.
The principle to carry forward
Retain both halves of a qualified position: useful measurement and the ability to question its interpretation.
Check 2
The statement that teachers’ behavior was “an intelligible response” primarily serves to:
A. Approve the trustees’ choice of incentives as educationally effective.
Review this choice. The author explains the response but subsequently criticizes the authority given to the count.
B. Explain the behavior without attributing a shared intention to undermine reading.
Correct. The phrase follows the rejection of a conspiracy explanation and links behavior to the incentives.
C. Deny that the recognition policy influenced classroom decisions.
Review this choice. The account explicitly connects the changed incentives with the response.
D. Establish that faster book completion necessarily reflects better comprehension.
Review this choice. The passage distinguishes completion from other purposes of reading and supplies no necessary equivalence.
The principle to carry forward
An explanatory description can make behavior understandable without endorsing the policy that produced it.
Check 3
Which case most closely parallels the problem described in the passage?
A. A museum counts visitors to identify days when opening hours may limit access.
Review this choice. This parallels the initial useful diagnostic role of the count, not the later substitution of proxy for purpose.
B. A museum investigates why attendance and visitor accounts give different impressions of an exhibit.
Review this choice. This preserves the capacity for conflicting evidence to challenge an interpretation, closer to the proposed remedy.
C. A museum rewards visitor totals until exhibits are chosen mainly to maximize entries rather than its stated educational purpose.
Correct. The rewarded proxy becomes the dominant objective and displaces the underlying purpose, matching the mechanism.
D. A museum compares attendance records from two periods using the same counting procedure.
Review this choice. Consistent counting alone does not establish the institutional incentive problem.
The principle to carry forward
A strong analogy preserves the causal or structural relationship, not just the presence of a number.
Check 4
Suppose new records show that teachers began favoring books that could be completed quickly several years before completion counts affected recognition or resources. How should this affect the argument?
A. It weakens the proposed incentive explanation for the onset of that change, without showing that counts are always useless.
Correct. The timing challenges the mechanism offered for the start of the quick-completion selection pattern; the broader qualified argument about measurement need not be abandoned.
B. It proves that recognition policies cannot influence educational behavior.
Review this choice. Evidence about one change’s timing does not rule out all incentive effects.
C. It strengthens the claim that students prefer every short book to every demanding one.
Review this choice. The finding concerns assignment timing, not a universal preference among students.
D. It shows that the author’s proposed use of multiple forms of evidence is logically impossible.
Review this choice. The finding supplies counterevidence to one explanation; it does not make considering multiple observations impossible.
The principle to carry forward
Revise the claim directly affected by new evidence without extending the revision beyond what the evidence shows.
Continue learning
Related lessons
- CARS Argument Analysis: Follow the Author’s Position
- CARS main idea: finding the claim and its limits
- CARS analogies and application: transferring the author’s principle
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