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TOEFL iBT Reading “Read an Academic Passage”: how to answer “Why does the author mention…?” questions

Two adults discuss a research report at a campus study table.

How to answer purpose questions in the TOEFL iBT “Read an Academic Passage” task (format introduced in 2026): what an example does, findings versus recommendations, hedged claims, an exam routine and typical mistakes. For readers at upper intermediate (B2) and above.

In the TOEFL iBT “Read an Academic Passage” task you read a short academic text and answer multiple-choice questions about it. A common question asks why the author mentions an example. The right answer names the example’s job, such as illustrating or limiting a claim, not just its content. Other questions check whether you can separate what a study observed from what its authors recommend. This guide follows the TOEFL iBT format introduced in 2026 and suits candidates at upper intermediate (B2) and above.

Who this is for

  • Candidates preparing for the TOEFL iBT format introduced in 2026 who follow academic passages but miss “Why does the author mention…?” questions.
  • Readers who pick answers that sound right but say too much, such as “Tables alone caused the increase”.
  • Future university students who want a reading routine that also builds the careful language of academic writing and seminars.
  • Too early: if an academic paragraph still sends you to the dictionary every line (below about B2), start with the shorter everyday reading tasks, such as notices and messages, and come back.
  • Too easy: if you already explain the purpose of every example and the limits of every study without errors, move on to reviewing reading mistakes across tasks and to the listening tasks (links below).

Open the sample pages

Open the sample pages

Word cards

Personal · noise and study

Where do you study best: in silence or with some background noise? Why do you think that is?

Useful: ‘I tend to concentrate better when…’ · ‘It probably depends on the task.’ · ‘For example, when I’m…’

Personal · being understood

Think of a time you changed the way you spoke to be understood, for example in a new language or group. Did it cost you anything?

Useful: ‘I had to…, which meant that…’ · ‘It worked, but I felt…’ · ‘Looking back, I might have…’

Language pattern

  1. Choose the words that complete the sentence from the passage.

    Birds in noisier areas tended ______ songs with a higher minimum pitch.

    Show answer and explanation

    to sing

    Tend is followed by to + base verb: tended to sing.

  2. Choose the words that complete the sentence from the passage.

    The explanation seems ______: by raising the lowest notes of their songs, birds move their signal away from the low rumble of traffic

    Show answer and explanation

    straightforward

    Seem works like be: it is followed by an adjective, not an adverb.

  3. Choose the words that complete the sentence from the passage.

    The comparison with human speech is useful, but it may also ______ misleading.

    Show answer and explanation

    be

    A modal verb such as may is followed by the base form without to: may be.

  4. Choose the words that complete the sentence from the passage.

    These explanations are not mutually exclusive, and it is likely ______ more than one operates in some populations.

    Show answer and explanation

    that

    It is likely is followed by a that-clause with its own subject and verb.

  5. Choose the words that complete the sentence from the passage.

    In some species, lower-pitched songs appear ______ more attractive to females

    Show answer and explanation

    to be

    Appear is followed by to + base verb: appear to be.

  6. Choose the words that complete the sentence from the passage.

    In some species, lower-pitched songs appear to be more attractive to females, ______ because only larger or healthier males can produce them.

    Show answer and explanation

    possibly

    An adverb modifies the whole because-clause and marks it as one possible reason.

  7. Choose the words that complete the sentence from the passage.

    Urban birds clearly change the way they sing, and noise is very ______ one of the reasons.

    Show answer and explanation

    likely

    Very likely here means probably; it limits how strongly the author claims noise is a cause.

  8. Choose the words that complete the sentence from the passage.

    Whether that change represents a successful adaptation, a costly compromise or both is still ______ debated.

    Show answer and explanation

    being

    Is still being + past participle is the present continuous passive: the debate is going on now.

More practice

Explain Why an Example Is There — worked model

Two adults discuss a research report at a campus study table.

A reading club once gave new members a long list of rules, and few people remembered them. The club replaced the list with three illustrated situations. A concrete example is a specific case that makes a general idea easier to understand. In one picture, a member moves to a quiet corner before answering a phone call. The picture is not really about telephones. It shows how a general rule, respecting other readers, can become a visible action that new members can copy.

What the model shows

  • Definition: a concrete example is a specific case.
  • Function: the phone-call situation turns an abstract rule into a visible action.
  • Wrong scale: “the picture includes a phone” describes content, not purpose.
  • When a question asks why an example appears, name the larger idea it supports.
  • A detail about the picture can be true but still fail to explain its purpose.
  • The strongest answer connects the example to the general principle it illustrates.
  • Read the sentences before and after the example to identify the link.

Find the supported response

A student research group wanted to understand how people learn the categories in a digital museum catalogue. One version grouped objects by the material they were made from. Another grouped them by what people had used them for. The group asked twelve volunteers to find several objects in each version and explain their choices aloud.

A wooden cooking bowl illustrates why these systems can lead to different search paths. In a material-based catalogue, a visitor might look under wood. In a use-based catalogue, the same visitor might look under preparing food. Neither description is necessarily wrong; each highlights a different feature of the object.

Some volunteers found the use-based categories more familiar, while others preferred the material-based labels. Several changed strategy after seeing an object they had not expected. The researchers concluded that a catalogue can support different users by offering more than one route. They did not claim that one classification system was universally best. Their small project also examined search behaviour, not how much visitors remembered about the objects afterward.

  1. Why does the author describe the wooden cooking bowl?

    Show answer and explanation

    To show how one object can fit different classification systems

    The bowl connects the two systems: material points to wood, while function points to preparing food.

  2. What did the volunteers do during the project?

    Show answer and explanation

    Find objects and explain their choices aloud

    The first paragraph says they found objects in each version and explained their choices.

  3. What does highlights most nearly mean here?

    Show answer and explanation

    Draws attention to

    Each system draws attention to a different feature of the same object.

Check the deeper meaning

A student research group wanted to understand how people learn the categories in a digital museum catalogue. One version grouped objects by the material they were made from. Another grouped them by what people had used them for. The group asked twelve volunteers to find several objects in each version and explain their choices aloud.

A wooden cooking bowl illustrates why these systems can lead to different search paths. In a material-based catalogue, a visitor might look under wood. In a use-based catalogue, the same visitor might look under preparing food. Neither description is necessarily wrong; each highlights a different feature of the object.

Some volunteers found the use-based categories more familiar, while others preferred the material-based labels. Several changed strategy after seeing an object they had not expected. The researchers concluded that a catalogue can support different users by offering more than one route. They did not claim that one classification system was universally best. Their small project also examined search behaviour, not how much visitors remembered about the objects afterward.

  1. What recommendation follows from the findings?

    Show answer and explanation

    Offer more than one route through the catalogue

    Different preferences and changing strategies support giving users more than one route.

  2. Why does the passage mention volunteers changing strategy?

    Show answer and explanation

    To show that a user’s approach may depend on the object

    Several volunteers changed strategy after an unexpected object; this supports flexible search routes.

  3. Which question was outside the project’s stated scope?

    Show answer and explanation

    How much visitors remembered later

    The final sentence says the project examined search behaviour rather than later memory.

Explain and transfer the strategy

A student research group wanted to understand how people learn the categories in a digital museum catalogue. One version grouped objects by the material they were made from. Another grouped them by what people had used them for. The group asked twelve volunteers to find several objects in each version and explain their choices aloud.

A wooden cooking bowl illustrates why these systems can lead to different search paths. In a material-based catalogue, a visitor might look under wood. In a use-based catalogue, the same visitor might look under preparing food. Neither description is necessarily wrong; each highlights a different feature of the object.

Some volunteers found the use-based categories more familiar, while others preferred the material-based labels. Several changed strategy after seeing an object they had not expected. The researchers concluded that a catalogue can support different users by offering more than one route. They did not claim that one classification system was universally best. Their small project also examined search behaviour, not how much visitors remembered about the objects afterward.

Your open task

  • Explain the bowl example using a different everyday object with two possible categories.
  • Distinguish one observed result from the researchers’ recommendation.
  • Propose an additional catalogue route and explain who might benefit.

Find the supported response

A campus design class conducted a small observation project in a courtyard. For one week, the courtyard contained only individual chairs. During a second week, the same chairs were placed around several small tables. The students counted how many visitors spoke to someone they had not arrived with. They also asked a few visitors why they had chosen a particular seat.

More new conversations were observed during the second week. Some visitors said that a shared table gave them an easy reason to speak, such as asking whether a place was free. Others still preferred an isolated chair, especially when reading or making a phone call. The students therefore proposed a mixed arrangement rather than replacing every individual seat.

Their report was cautious. The weather was warmer in the second week, and a campus event brought extra visitors to the area. These differences could have influenced the observations. The project suggested that furniture arrangement may facilitate conversation, but it did not establish that tables alone caused the change.

  1. Which statement best captures the passage’s main idea?

    Show answer and explanation

    Shared tables may encourage conversation, but the evidence has limits

    The report links arrangement to possible conversation benefits while explicitly noting confounding differences.

  2. Why did some visitors prefer an isolated chair?

    Show answer and explanation

    They wanted to read or make a phone call

    The second paragraph gives reading and phone calls as reasons for choosing individual seating.

  3. What does facilitate most nearly mean in this passage?

    Show answer and explanation

    Make easier

    Shared tables gave visitors an easy opening for conversation; facilitate therefore means make easier.

Check the deeper meaning

A campus design class conducted a small observation project in a courtyard. For one week, the courtyard contained only individual chairs. During a second week, the same chairs were placed around several small tables. The students counted how many visitors spoke to someone they had not arrived with. They also asked a few visitors why they had chosen a particular seat.

More new conversations were observed during the second week. Some visitors said that a shared table gave them an easy reason to speak, such as asking whether a place was free. Others still preferred an isolated chair, especially when reading or making a phone call. The students therefore proposed a mixed arrangement rather than replacing every individual seat.

Their report was cautious. The weather was warmer in the second week, and a campus event brought extra visitors to the area. These differences could have influenced the observations. The project suggested that furniture arrangement may facilitate conversation, but it did not establish that tables alone caused the change.

  1. Why is the campus event mentioned?

    Show answer and explanation

    It may have affected who used the courtyard

    The event brought extra visitors, so it is a possible influence beyond furniture arrangement.

  2. What arrangement did the students recommend?

    Show answer and explanation

    A combination of shared and individual seating

    The report proposes a mixed arrangement in response to different visitor preferences.

  3. Which conclusion is too strong for the evidence?

    Show answer and explanation

    Tables alone caused the increase in conversations

    The final paragraph explicitly rejects a claim that tables alone caused the observed change.

Explain and transfer the strategy

A campus design class conducted a small observation project in a courtyard. For one week, the courtyard contained only individual chairs. During a second week, the same chairs were placed around several small tables. The students counted how many visitors spoke to someone they had not arrived with. They also asked a few visitors why they had chosen a particular seat.

More new conversations were observed during the second week. Some visitors said that a shared table gave them an easy reason to speak, such as asking whether a place was free. Others still preferred an isolated chair, especially when reading or making a phone call. The students therefore proposed a mixed arrangement rather than replacing every individual seat.

Their report was cautious. The weather was warmer in the second week, and a campus event brought extra visitors to the area. These differences could have influenced the observations. The project suggested that furniture arrangement may facilitate conversation, but it did not establish that tables alone caused the change.

Your open task

  • Explain the main claim to someone who has not read the report, including one limitation.
  • Use facilitate in a new sentence about learning or communication.
  • Suggest one change that would make a follow-up observation easier to interpret.

Infer Carefully and Check Exceptions — worked model

Two adults discuss a research report at a campus study table.

In a small study, a class surveyed twenty people who used a neighbourhood noticeboard. Most said they noticed large headings before reading smaller details. The class concluded that headings deserved careful attention when a message was designed. It did not conclude that readers ignored all smaller text or that every neighbourhood had the same preferences.

An inference combines information that the passage supplies. If headings are noticed first, a heading may affect whether a reader continues. This is a cautious extension of the observation. By contrast, claiming that a particular font doubles attendance would require evidence that the passage never provides. The size of the sample also limits how widely the finding can be applied.

What the model shows

  • A warranted inference stays close to stated evidence.
  • Not stated and contradicted are different: an unmentioned font effect is simply unsupported.
  • Watch absolute words such as all, always and proves.
  • For an EXCEPT question, verify the supported choices before identifying the unsupported one.

Find the supported response

A student project compared two versions of a notice about borrowing sports equipment. Both versions contained the same information: collection hours, return instructions and a contact address. In Version A, this information appeared in one continuous paragraph. In Version B, it appeared under three short headings. Sixteen students each read one version and then described what they would do to borrow and return an item.

Students who read Version B more often mentioned the return instructions without being prompted. However, the two groups were similar in how often they recalled the contact address. Several readers of Version A said they had focused on the opening sentence and overlooked later details.

The project team suggested using headings when a notice contains several separate actions. The team also noted important limits. The students were volunteers from one class, the groups were small, and the project involved only one notice. A later study would need different readers and messages before the team could make broader claims about notice design.

  1. Which inference is best supported?

    Show answer and explanation

    Headings may help readers notice separate actions in a message

    Version B improved recall of return instructions, supporting a limited claim about noticing separate actions.

  2. What was the same in both notice versions?

    Show answer and explanation

    The information about collection, return and contact

    The first paragraph states that the same information appeared in different layouts.

  3. Which detail did the two groups recall at similar rates?

    Show answer and explanation

    The contact address

    The second paragraph directly contrasts similar contact-address recall with different return-instruction recall.

Check the deeper meaning

A student project compared two versions of a notice about borrowing sports equipment. Both versions contained the same information: collection hours, return instructions and a contact address. In Version A, this information appeared in one continuous paragraph. In Version B, it appeared under three short headings. Sixteen students each read one version and then described what they would do to borrow and return an item.

Students who read Version B more often mentioned the return instructions without being prompted. However, the two groups were similar in how often they recalled the contact address. Several readers of Version A said they had focused on the opening sentence and overlooked later details.

The project team suggested using headings when a notice contains several separate actions. The team also noted important limits. The students were volunteers from one class, the groups were small, and the project involved only one notice. A later study would need different readers and messages before the team could make broader claims about notice design.

  1. All of the following are stated limits EXCEPT:

    Show answer and explanation

    The notices contained different information

    Different information is not a stated limitation; the two versions explicitly contained the same information.

  2. Why would a later study need different readers and messages?

    Show answer and explanation

    To examine whether the finding extends beyond this small project

    The limited sample and single message prevent broad conclusions without further investigation.

  3. What does overlooked most nearly mean here?

    Show answer and explanation

    Failed to notice

    Readers focused on the opening and missed later details; overlooked means failed to notice.

Explain and transfer the strategy

A student project compared two versions of a notice about borrowing sports equipment. Both versions contained the same information: collection hours, return instructions and a contact address. In Version A, this information appeared in one continuous paragraph. In Version B, it appeared under three short headings. Sixteen students each read one version and then described what they would do to borrow and return an item.

Students who read Version B more often mentioned the return instructions without being prompted. However, the two groups were similar in how often they recalled the contact address. Several readers of Version A said they had focused on the opening sentence and overlooked later details.

The project team suggested using headings when a notice contains several separate actions. The team also noted important limits. The students were volunteers from one class, the groups were small, and the project involved only one notice. A later study would need different readers and messages before the team could make broader claims about notice design.

Your open task

  • Give a cautious conclusion using may or suggests and support it with one observation.
  • Explain why one unsupported statement is not the same as a disproved statement.
  • Design a better follow-up comparison in two or three sentences.

Careful claims: hedging in the passage

  1. Choose the words that complete the sentence from the passage.

    Birds in noisier areas tended ______ songs with a higher minimum pitch.

    Show answer and explanation

    to sing

    Tend is followed by to + base verb: tended to sing.

  2. Choose the words that complete the sentence from the passage.

    The explanation seems ______: by raising the lowest notes of their songs, birds move their signal away from the low rumble of traffic

    Show answer and explanation

    straightforward

    Seem works like be: it is followed by an adjective, not an adverb.

  3. Choose the words that complete the sentence from the passage.

    The comparison with human speech is useful, but it may also ______ misleading.

    Show answer and explanation

    be

    A modal verb such as may is followed by the base form without to: may be.

  4. Choose the words that complete the sentence from the passage.

    These explanations are not mutually exclusive, and it is likely ______ more than one operates in some populations.

    Show answer and explanation

    that

    It is likely is followed by a that-clause with its own subject and verb.

  5. Choose the words that complete the sentence from the passage.

    In some species, lower-pitched songs appear ______ more attractive to females

    Show answer and explanation

    to be

    Appear is followed by to + base verb: appear to be.

  6. Choose the words that complete the sentence from the passage.

    In some species, lower-pitched songs appear to be more attractive to females, ______ because only larger or healthier males can produce them.

    Show answer and explanation

    possibly

    An adverb modifies the whole because-clause and marks it as one possible reason.

  7. Choose the words that complete the sentence from the passage.

    Urban birds clearly change the way they sing, and noise is very ______ one of the reasons.

    Show answer and explanation

    likely

    Very likely here means probably; it limits how strongly the author claims noise is a cause.

  8. Choose the words that complete the sentence from the passage.

    Whether that change represents a successful adaptation, a costly compromise or both is still ______ debated.

    Show answer and explanation

    being

    Is still being + past participle is the present continuous passive: the debate is going on now.

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What the task looks like

You read one passage, for example a short account of a study or a scientific explanation. No background knowledge is needed: every correct answer rests on the text. Practice questions check five things:

  • Main idea: “Which statement best captures the passage’s main idea?”
  • Detail: “What did the volunteers do during the project?”
  • Vocabulary: “What does highlights most nearly mean here?”
  • Inference: “Which inference is best supported?”
  • Purpose: “Why is the campus event mentioned?”

Purpose questions: ask what the example does

An example is a specific case that makes a general idea easier to understand; a purpose question asks about its job, not its content. Name the job first: to illustrate, to contrast, to make an idea easy to picture, or to qualify a claim.

Try it on a passage about a museum catalogue that groups objects either by material or by use: a visitor might look under “wood” or under “preparing food”.

  • “A wooden cooking bowl illustrates why these systems can lead to different search paths.”
Why does the author describe the wooden cooking bowl?

Observation, recommendation or untested claim?

Wrong answers often mix up the layers of a study:

  • Observation: “Some volunteers found the use-based categories more familiar, while others preferred the material-based labels.”
  • Recommendation: “The researchers concluded that a catalogue can support different users by offering more than one route.”
  • Outside the scope: the project “examined search behaviour, not how much visitors remembered about the objects afterward”, so an answer about memory is unsupported.
  • Limits: a courtyard study saw more conversations at shared tables, but the weather was warmer and a campus event brought extra visitors, so “Tables alone caused the increase” is too strong.

Hedging: how careful writers limit a claim

Academic writers soften claims to fit their evidence, and correct answers keep that softness. Notice the grammar:

  • tend to + base verb: “Birds in noisier areas tended to sing songs with a higher minimum pitch.”
  • seem + adjective, not adverb: “The explanation seems straightforward.”
  • may + base verb, without to: “The comparison with human speech is useful, but it may also be misleading.”
  • it is likely that + full clause: “It is likely that more than one operates in some populations.”
  • appear to be: “lower-pitched songs appear to be more attractive to females”
Learn this unit your way

Typical mistakes

If your first language puts hedges at the end of the sentence, look for them earlier in English: at the start (“It is likely that…”) or before the verb (“tended to”).

  • Choosing an answer that describes the example instead of explaining why it is there.
  • Accepting “all”, “always” or “proves” when the passage is cautious.
  • Taking a comparison literally: a person raising their voice at a crowded party helps picture birds singing over traffic, but the author warns that the comparison may be misleading.
  • In an EXCEPT question, not confirming the supported choices first.

How to practise

One passage a day builds the habit. This routine takes about 20 minutes:

  • Read: write the main idea in one sentence, including its limit.
  • Answer: note the sentence that proves each choice.
  • Label: mark three sentences as observation, recommendation or limit.
  • Transfer: explain the bowl with your own object; a bicycle helmet could sit under “plastic” or under “safety equipment”.
  • Speak: answer a discussion question aloud with a hedge: “I tend to concentrate better when…” or “It probably depends on the task.”

Next step

When you can name the job of every example and the limit of every study, review your mistakes across the reading tasks, then move on to listening, where answers must match the evidence just as closely.

Frequently asked questions

What is “Read an Academic Passage” in TOEFL iBT?

A Reading task in the TOEFL iBT format introduced in 2026: you read a short academic passage and answer multiple-choice questions on its main idea, details, vocabulary, inferences and the purpose of its examples.

How do I answer “Why does the author mention…?” in TOEFL reading?

Read the sentences around the example, decide which general point it supports, and choose the answer that states its job, such as to illustrate or to contrast. An answer that only describes the example is usually a trap.

Is “not stated” the same as “false” in TOEFL reading?

No. A false statement is contradicted by the passage; an unstated one, like a claim about fonts in a text that never mentions them, simply has no support. Neither answers a question about what the passage says.

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