An SAT Reading & Writing micro-topic under Transitions (Expression of Ideas + Standard English Conventions). Free to read — no account needed.
A contrast transition tells the reader that the second part opposes, limits, or complicates the first. Instead of continuing in the same direction, the idea reverses or is qualified.
The usual signals are "however," "but," "yet," "in contrast," "nevertheless," and "still." "That said" marks a change in tone, and "while" or "whereas" set up a contrast within a single sentence.
To choose one, read whether the two parts agree or clash. Use a contrast word only when the second part reverses or complicates the first; if the two parts actually support each other, a contrast word is wrong.
This drives elimination. If the parts clearly support each other, any contrast choice can be crossed out; and if several choices all signal contrast, they are interchangeable, so they must all be wrong.
Worked examples
A text reads: "AI can flag early cancers that doctors miss. _____, researchers worry about its errors." Which fits: "Therefore" or "However"? Use "However." The second part raises a concern that opposes the first part's promise, so a contrast transition fits.
Two parts of a text clearly support each other. One answer choice offers "However." Should you keep it? No. "However" signals contrast, but the parts agree, so it does not fit and can be eliminated.
A text reads: "The new policy has clear benefits. _____, it may strain small businesses." Why does "That said" work? "That said" introduces a change in tone — here from a positive point to a cautionary one — which is exactly the contrast the second part provides.
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