Reading - Key Ideas and Details
What this domain asks you to do
Key Ideas and Details questions ask you to identify what a text says outright, what it implies, and how its parts hold together. The core skills are central/main idea, theme, objective summary, supporting details, inference, and citing the best textual evidence.
Concepts to master
- Main idea vs. theme: a main idea is what a passage says about its topic; a theme is a message about life or human nature, stated as a full sentence.
- Detail hierarchy: some details support the point, others are merely interesting. Ask whether removing a detail would weaken the author's point.
- Inference: text evidence plus logical reasoning - never outside knowledge or guesswork.
- Development: track what changes between the opening and closing of a passage (a character's belief, an argument's focus).
- Summary: cover the whole passage in order, with no opinion and no minor trivia.
Traps the test sets
Picking a detail that is true but minor; offering a topic where a theme is required (friendship instead of a statement about friendship); choosing evidence that is related but does not actually support the specific claim; over-reading when the question says explicitly; choosing a summary drawn from only the first paragraph.
Rule of thumb and worked example
For main idea, apply the so what? test: read your candidate answer and ask what the author wants you to conclude from it. If the answer only reports a fact, it is a detail.
Example: a paragraph explains that a city planted 400 trees downtown. The sentence about 400 trees is a detail. The sentence stating that the new trees lowered summer temperatures downtown is the main idea, because it explains why the planting mattered.