Reading: Main Idea, Detail, Inference, and Tone
What the questions actually test
ACCUPLACER Reading passages are short - roughly 50 to 150 words - and usually informational or argumentative. Almost every item belongs to one of six buckets: main idea, explicit detail, inference, vocabulary in context, author's purpose or tone, and the relationship between two ideas (contrast, cause and effect, example). Name the bucket before you look at the choices; it tells you what evidence to hunt for.
Traps that cost points
- True but off-target. A choice can accurately restate a fact from the passage and still fail to answer the question. If the stem asks for the main idea, a supporting detail is wrong no matter how accurate it is.
- Extreme wording. Always, never, proves, everyone usually overshoot a passage that says often or suggests. Qualified answers win more often than absolute ones.
- Outside knowledge. Answer only from the text. A scientifically correct statement the passage never makes is still wrong.
- Connotation slips. Vocabulary-in-context answers must fit the logic of that sentence, not just the dictionary's first meaning.
Rule of thumb
For inference items, the right answer is a small step beyond the text - supported, not merely plausible. Ask: can I point to the sentence that makes this almost unavoidable? If you need two extra assumptions, eliminate it. For tone, look at adjectives and verbs, not just the topic.
Worked example
A passage states that a city replaced its bus fleet and ridership rose 12 percent the next year while fares stayed unchanged. The new buses likely contributed to higher ridership is supported. New buses are the only reason ridership rose overreaches. Ridership rose because fares dropped contradicts the passage outright.