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About the GRE Test - format, scores, fees, and registration
Payne said, “Only the GRE revised General Test gives test takers the power of confidence by letting them change answers to help them get their best scores, and knowing they can do their best helps them get that much closer to their graduate or business school goals.”
Graduate Record Examinations - Wikipedia
“The GRE revised General Test is the only admissions test that allows business school and graduate school applicants to mark questions within a section and go back to change answers if they had second thoughts,” says , Educational Testing Service (ETS) Vice President & COO of Global Education. “The test-taker friendly design can help people perform better compared to how they would have done without the opportunity to change answers. Now, we have evidence that this ability to go back to complete or change an answer may help test takers improve their scores.”