DAT RC main idea questions, and how to actually find the author point

Main idea questions look like the friendliest questions on the DAT RC section. They are not. They are the second-biggest leak after inference, and almost every student misses them for the same reason.

They pick the answer that matches the topic. The right answer matches the argument.

What main idea questions actually ask

Main idea questions use language like the primary purpose of the passage is, the passage is primarily concerned with, or which of the following best expresses the central idea of the passage.

These are not asking what the passage is about. They are asking what the author is doing with that topic. Three different authors writing about coral reefs would each have a different main idea, even though the topic is identical.

The two ways students miss

Too narrow

You pick a choice that perfectly describes one paragraph but not the whole passage. The choice felt right because you remembered reading it. It is also wrong, because main idea is whole-passage scope.

Too broad

You pick a choice that names the topic but says nothing about the author take. Coral reefs are complex ecosystems is a topic statement, not a main idea. The author argues that coral reef recovery requires both predator protection and water-quality controls is a main idea.

The first-and-last paragraph trick

On a DAT-style passage, the author main argument is almost always framed in the first paragraph and restated in the last. The middle paragraphs are evidence and counter-evidence. If you cannot remember the main idea after a full read, go back and read just the first paragraph and the last paragraph.

The author either tells you what they think directly in those paragraphs, or asks the question that the rest of the passage answers. Either way, the structure is yours.

What to do this week

1. 1
   Take 5 RC passages.

   Before answering any questions, write a one-sentence main idea in your own words.
2. 2
   Compare your sentence to the right answer.

   Were you topic-level or argument-level? If you wrote topic, you need to push deeper.
3. 3
   On the next 5 passages, force a subject-verb-object sentence.

   Like: The author argues that ___ is more important than ___. Topic-only sentences do not have verbs that capture the author take.
4. 4
   When stuck, return to the first and last paragraphs.

   The argument lives there. The middle is just evidence.

See all 7 question patterns for the broader framework. Inference and tone use a similar what-the-author-thinks lens. Once you have main idea down, those get easier too.

Related: Inference questions · Tone questions