Central Ideas and Details
Identifying main ideas, locating specific details, and making inferences
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You read a short passage. The question asks: what does this text say, suggest, or set out to do?
Why this matters
Central Ideas and Details is the most common skill in the Information and Ideas domain. Students assume it's just "read and answer," but the five pattern types test very different skills — summarizing, locating, inferring, comparing, and identifying purpose. Mixing them up is how you lose points on questions you actually understood. Learn to recognize what kind of question you're looking at.
The five patterns
Main Idea Summary
Distill the entire passage into one sentence. The right answer covers everything; wrong answers are too narrow (one detail), too broad (overclaims), or flat-out opposite.
›Detail Retrieval
Find a specific fact the passage states directly. The answer will be rephrased, not quoted. Watch for choices that flip a single word and reverse the meaning.
›Inference
Draw a logical conclusion the passage implies but never says outright. Every detail must point toward your answer — if you're guessing, you've gone too far.
›Comparative Relationships
Two subjects appear in the passage. The question asks how they relate — a similarity, a difference, or a connection. Make sure you assign the right details to the right subject.
›Function Purpose
Why did the author include this detail? Which question does this passage answer? You're identifying the job a piece of information does, not restating what it says.
The biggest trap: choosing a "too narrow" answer on Main Idea questions. The SAT loves offering a choice that perfectly restates one sentence from the passage. It's accurate, it's clearly supported — and it's wrong, because a main idea has to cover the whole passage. If your answer only accounts for one paragraph or one example, keep looking.