SAT Information & Ideas: method and traps

Every question in this area has the same underlying demand: the answer must be supported by the passage, not merely consistent with it. A choice can be true about the world, sensible, and even likely, and still be wrong because the text does not establish it.

Practise the 112 questions Play a timed round

This area at a glance

6 worked examples · 6 traps

112

questions

  • Foundation 7
  • Standard 79
  • Challenge 26

What this area asks for

  • Central ideas and supporting detail
  • Inference from a short text
  • Command of evidence, in text and in data
  • Reading a described table or figure
  • Relationships between paired texts
  • Synthesising a set of notes

The method

One routine that applies across the whole area, rather than a rule for each question type.

  1. 1

    Answer in your own words before reading the choices

    A one-phrase answer of your own gives you something to compare against. Without it, four fluent options all sound plausible, and you end up choosing by tone rather than by evidence.

  2. 2

    Point to the words that make a choice true

    For the choice you pick, name the phrase in the passage that supports it. If you cannot point at one, you are inferring past the text, which is exactly what the wrong choices are designed to reward.

  3. 3

    For evidence questions, ask what the claim predicts

    A finding strengthens a claim when it is what the claim predicts, and weakens it when it is what the claim rules out. Anything about popularity, funding, or how people felt is usually neither.

  4. 4

    Read data questions for the comparison, not the numbers

    A statement about a table is right or wrong because of a relationship: more than, fewer than, at least. Find that relationship first, then check the two figures it needs. Checking every number is slower and no more accurate.

Worked examples

Each one is worked to the point where the next move is obvious, not to the answer alone.

1

A town added streetlights along one footpath. Over the next year, evening use of that path rose while evening use of an unlit path nearby was unchanged. Which conclusion does the text support?

  1. 1.Identify what changed and what did not: the lit path rose, the unlit path did not.
  2. 2.The unlit path acts as a comparison, which rules out "evenings got busier generally".
  3. 3.Anything about safety statistics, cost, or resident opinion is outside the text.

The lighting is plausibly connected to the increase on that particular path.

2

A researcher claims that labelling shelf prices per unit helps shoppers choose cheaper options. Which finding would most strengthen the claim?

  1. 1.State what the claim predicts: shoppers exposed to unit labels buy cheaper options than those who are not.
  2. 2.Look for a choice that compares those two groups.
  3. 3.Reject findings about shopper preference, label cost, or how many shops adopted labels; none of them measures what was bought.

Shops that added unit labels saw a shift toward lower-priced options relative to shops that did not.

3

Text 1 says a policy worked. Text 2 says it worked only where a second condition was met. How do they relate?

  1. 1.Check whether Text 2 denies the effect. It does not; it reports the effect under a condition.
  2. 2.A text that narrows when something holds is qualifying, not contradicting.

Text 2 limits the conditions under which Text 1 holds.

4

A passage states that a treatment 'showed no significant difference' from placebo. Which conclusion does it support?

  1. 1.Separate what was found from what would be convenient to conclude.
  2. 2.'No significant difference' means the study did not detect one, not that none exists.
  3. 3.Reject choices asserting the treatment does not work, and choices asserting it does.
  4. 4.The supported reading is about what the evidence can carry.

The study did not establish a difference either way

5

A text says a bird species was recorded at 40 sites in 1990 and 62 sites in 2020, and that surveyor numbers tripled over the same period. Which inference is supported?

  1. 1.Note that two things changed, not one.
  2. 2.More sites could reflect more birds, more looking, or both.
  3. 3.Any choice attributing the rise to the birds alone ignores the second change the text supplies.
  4. 4.The supported inference keeps both causes live.

The rise cannot be attributed to bird numbers on this evidence alone

6

Which finding would most strengthen the claim that a river's fish returned because of a new filter, rather than by chance?

  1. 1.Ask what would distinguish the filter from every other explanation.
  2. 2.A count after the filter alone cannot: the fish might have returned anyway.
  3. 3.What separates them is a comparison — a similar river with no filter, where numbers did not change.
  4. 4.Choose the finding that supplies the missing comparison.

Numbers held steady in a comparable river with no filter

Where marks are lost

Each of these has a matching wrong answer waiting among the four choices.

The true-but-unsupported choice

The most tempting wrong answer is a statement you agree with that the passage never establishes. Agreement is not evidence.

The overstated choice

Words like "all", "never", "proves" and "eliminates" almost always overshoot a passage that reported a change in one place over one year.

Half-right choices

A choice that gets the subject right and the relationship wrong is still wrong. Read to the end of every option; the error is usually in the last clause.

Confusing a cause with a correlation

A text reporting that two things moved together supports a connection, not a mechanism. Choices that name a cause are usually going further than the text.

Treating an absence of evidence as evidence of absence

'No significant difference' means the study did not detect one. A choice saying the treatment does not work claims more than that, and so does a choice saying it does. The supported answer is usually the one about what the evidence can carry.

Generalising from the group that answered

A survey where 320 of 1,200 households replied supports claims about those 320. A majority of repliers is not a majority of residents, and the gap is largest exactly when the response rate is lowest.

The discipline this area rewards is narrow and learnable: decide what the text actually establishes, then refuse to be moved by a choice that sounds better than the evidence allows.

Now work the questions

112 Information and Ideas questions with a worked explanation for each, on the SAT Reading & Writing page.

Open SAT Information & Ideas practice

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SAT® Information & Ideas: Method | IQ Test Center