On test day, more GRE points are lost to fatigue than most students realize. I've seen this situation play out over and over again. Students start a test strong. They are focused, accurate, and in control. Then, somewhere in the middle of the exam, things start to slip. They reread questions, make small mistakes, hesitate on decisions, and begin second-guessing their answers. By the final section, their performance is noticeably worse, not because the questions got harder, but because they’re mentally fatigued.

The GRE is not simply a test of knowledge and skills. It's a test of your ability to sustain high-level cognitive performance under pressure. Fatigue impacts focus, accuracy, decision-making, and confidence. Even a slight decline in mental sharpness can cost you multiple questions.

I often see this kind of test-day performance decline in students who haven't spent enough time in the practice-test phase of their training. In other words, they've invested heavily in building knowledge and skills but not put nearly enough time into training their brain to handle the rigors of sitting for a full-length exam.

Here's the sneaky part: fatigue doesn't always feel like fatigue. It often feels like the question is unusually hard, or like you're just not focused that day, or like maybe you don't know the material as well as you thought. So, students try to fix a knowledge problem when the real issue could be cognitive performance under pressure and test-day stamina.

If you want to perform well on test day, you need to train for stamina the same way you train for skill. That means building endurance deliberately by incorporating longer study blocks on a regular basis. It means taking full-length practice tests seriously: testing under realistic conditions, without distractions. It also means reducing unnecessary mental load by using consistent approaches rather than reinventing your process on every question.

After more than 20 years in test prep, I can tell you that some of the most avoidable score drops I've seen have nothing to do with ability. They're simply the result of students' not being prepared to perform for the full duration of the exam.

If you're preparing for the GRE, don't just build your knowledge and skills. Spend sufficient time building your ability to sit for and think carefully during a 2-hour test.