Central ideas, command of evidence (textual and quantitative), and inferences as tested on the digital SAT.
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- What is the difference between a topic and a central idea?
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A topic is what a text is about (a subject), while a central idea is the author's main point or claim about that topic.- Where is a central idea most commonly stated in a passage?
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In the introduction or opening paragraphs, though it can appear anywhere and may be implied rather than stated.- How can you test whether a sentence expresses the central idea?
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Ask whether the entire passage would support that sentence, and whether removing it would make the passage incoherent.- What is the role of supporting details in relation to a central idea?
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Supporting details provide evidence, examples, and explanations that develop and reinforce the central idea.- What is an implied central idea?
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A main idea that is not directly stated but must be inferred from the details, examples, and tone throughout the text.- How does textual evidence differ from inference?
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Textual evidence is information directly stated in the text, while an inference is a logical conclusion based on that evidence and prior knowledge.- What makes evidence relevant to a central idea?
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Evidence is relevant if it directly supports, explains, or illustrates the central idea rather than going off on a tangent.- When paraphrasing textual evidence, what must you preserve?
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The precise meaning of the original text, even though you use different words.- What is an inference?
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A logical conclusion drawn by combining information from the text with prior knowledge.- What is the difference between a valid inference and an assumption?
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A valid inference is supported by textual evidence and logic, while an assumption is a belief with little or no support.- How much evidence is needed to draw a valid inference?
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Enough textual detail and context to make the conclusion follow logically, without requiring unsupported leaps.- What does it mean when a text uses a quantitative detail like a statistic or graph?
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It provides numerical evidence to support a claim or central idea with concrete, measurable data.- How should you interpret a graph or chart when analyzing evidence?
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Identify what it measures, note trends and key data points, and connect the data to the author's argument or claim.- What is an author's purpose?
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The author's main reason for writing: to inform, persuade, explain, entertain, or describe.- How are author's purpose and central idea related?
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The central idea often reflects the author's purpose; for example, a persuasive text's central idea is usually a claim the author wants readers to accept.
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