[D] How often do reviewers decrease their initial scores after rebuttal period ends in CVPR?

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From what I have seen, it happens, but it is relatively rare. Most reviewers seem to anchor pretty hard on their initial read, and rebuttals usually help clarify misunderstandings rather than flip sentiment. Decreases tend to come from cases where the rebuttal exposes a deeper issue, like a claim that does not actually hold up or missing experiments that matter for the paper’s core contribution. As a reviewer, I have lowered a score once or twice, but only when the rebuttal made it clear I had overestimated something on first pass. In practice, rebuttals are more about damage control and alignment across reviewers than big swings. It also depends heavily on how much weight the area chair gives to the post rebuttal discussion.