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SAT® · Reading and Writing: Information and Ideas

Interpreting the Key Details

A key detail question asks you to report exactly what a text states, not what it implies or what seems reasonable. The right answer restates one part of the text precisely, including any limits on who or what it applies to.

Detail questions feel easy because the answer is sitting right there in the text, no inference required. That's exactly what trips people up: if you skim instead of reading closely, you grab the general topic of a sentence instead of its exact content, and the wrong answer choices are built to match that fuzzy impression. The fix is to treat the question like a pointer. The question stem usually names a person, a number, or an action from the text. Scan for that exact anchor, read the one or two sentences around it closely, and match the answer choice to what's actually written there, not to the general subject of the paragraph.

A common trap is scope. A text might say a result holds for some of a group, or only for a subset that meets some condition, and a wrong answer will quietly stretch that to the whole group, swapping 'some' for 'all' or dropping a qualifier like 'among those that extended hours.' The correct answer preserves exactly who or what the claim is about. Watch especially for details split across two clauses joined by a word like because, since, or so. The text might state a change in one clause and its effect in the other; the full detail question answer often needs both pieces linked correctly, not just one clause in isolation.

This topic sits next to central ideas and inference questions in the same group, and the three build on each other. Central ideas ask what a whole text is about; inference asks what the text implies but doesn't say; key detail questions ask only what the text actually states. Getting comfortable with precise, close reading here makes the inference questions easier too, since you first have to know exactly what's given before you can reason about what follows from it.

Key terms

key detail
A specific fact, number, or action a text states directly, rather than implies.
scope
The exact group or condition a stated detail applies to, such as 'some' versus 'all.'
anchor
A name, number, or phrase in the question stem that points you to the matching sentence in the text.
split detail
A detail given across two clauses, often joined by because or so, where both parts are needed for a full answer.

Watch it explained

  1. How it worksHow do you locate the single sentence a detail question is about instead of rereading a whole text?
  2. Worked exampleWalk me through answering what researchers measured when a text reports both what they measured and what they predicted.
  3. Common mistakeWhy doesn't an answer that swaps 'some' for 'all' still count as the detail a text actually gave?
  4. Going furtherWhat changes about a detail question when the detail is split across two clauses joined by because?

Check yourself

Your turneasy1 of 3
Text: Marine biologist Nadia Correa expected that the reef fish she tagged would return to the same coral head every night. To find out, she tracked 50 tagged wrasse for 46 days and recorded the distance between each night's shelter and the one used the night before. The tracks show a median distance of 28 metres, with individual fish shifting shelters every few nights. According to the text, what did Correa measure?

End of topic.