Changing your test answers helps. Trust your brain and not your gut. Image Source

Is changing answers on your test a good idea?

There is a ton of data on the subject and the answer is: YES!

Do not just trust your first instinct on a test. If you answer a question but seconds later think you might know a better answer then you’re probably right.

But it’s even more important than that…

Changing your answer improves your score* but there is more to it that you’re going to want to know. You’re going to need to understand why this happens to fully appreciate its benefit.

*For the curious: Some of these studies controlled for knowing that changing your answer improves your score. That means, your score will still improve when you’re only changing it because you know changing it is smart. Students don’t go overkill and start changing right answers to wrong ones when they learning changing answers helps their score.

How does an answer change help?

Bubble hell… Ever try to change your answer on one of these? Better hope your eraser doesn’t suck. Image Source

Instincts are not about finding the truth. They are about survival.

Your brain doesn’t think through most stuff in life. It just uses shortcuts to fool yourself into thinking you know. (The technical term is heuristics.)

Do you remember how it felt to be learning something new like driving a car?

At first, it can be complicated. Move the gears. Check the mirrors. Hold the brakes and turn the wheel. There are hundreds of details that your brain needs to look out for. When you’re learning anything new your brain is working overtime. Now imagine how you feel doing that new thing you learned years later. It got easier, right?

Stuff gets easier because the brain starts creating shortcuts for decision making. When I’m driving, I don’t see brake lights come on in front of me and think, “Man… what are those lights for again?” I just press the brakes. It happens. I don’t think about any of it.

These heuristics make up most of your life.

When you’re taking a test, heuristics are usually your first instincts.

These shortcuts are sufficient a ton of the time. (When you’re prepared they’ll usually be right. )

If you see an answer that instantly looks related to the question then your brain is going to start ringing alarm bells (“This might be it.”) The logical part of your brain hasn’t even come into the station and the conductor is screaming, “ALL ABOARD!!”

Changing your answer is letting the logical part of your brain take the wheel.

You are going to end up right more often than you end up wrong.


Red pens draw your attention. That’s a good thing but it comes with some problems. (I know what a CV is. I don’t care. I like the red pen.) Image Source

Yes… my experience says otherwise too. That’s because my experience is just another heuristic. It’s a good first guess but it’s just wrong.

When you’re examining your completed tests, your brain probably has a shortcut of looking at your wrong answers (and skipping the ones you got right.) The bright red pen will direct you straight to your problem areas. That means you’re probably not getting a fair representation of your results.

When you get an answer wrong because you changed your answer, you will probably notice it. It will stand out. The bright red circle just pulls your brain in. It forces your attention to it. Since it’s a question you probably spent a minute or two on, you’ll remember why you got it wrong.

When you get an answer right because you changed your answer, the opposite happens. There are no red circles directing your attention to how awesomely smart thinking twice was. It will just slide by unnoticed while you let your eyes wander over other red marked areas you need to think about.

Your brain focuses your attention on what is needed instead of what worked perfectly as planned. It’s just another shortcut making the appreciation of changing your answer hard to notice.

When You Shouldn’t Pick A New Answer

It’s not a given that you should always change your answer though.

The research has shown some answer changing actually hurts your chances of being right.

Do not change your answer when you’ve already changed it once.

This is where you start to see a reduction in your scores.

In fact, changing your answer a second time is probably a sign that you need to focus on improving your study strategy. This is the kind of problem that student’s focusing on familiarization instead of memorization have.

Most Important Of All

Studying better can reduce your need to change your answers. It can connect your gut with your memory. Image Source

If you’re regularly changing your answer then this is a blatantly obvious sign something is wrong.

Sure… you’re going to change your answers a couple times on every test.

If you’re noticing yourself get frustrated on question after question then it is a sign your study routine is completely out of whack. You need to ask yourself why your gut instinct isn’t lining up with reality? Something is wrong. (Some exceptions exist but they’re rare.)

Heuristics aren’t perfect but they shouldn’t be wrong on questions you’re properly prepared for. By the time you’re done reading the question your brain can be screaming the right answer to you. That is a sign you know the subject. Struggling to pick between two answers is a sign you’re missed something. It’s part of test-taking but too much of it is trouble

You need to improve your studying.

Some of the most common problems are using familiarization based strategies and avoiding test-taking (recall) based strategies. When you’re recognize an answer but can’t quite put your finger on whether or not it’s right, you’ll probably end up changing your answer.

Changing Answers On A Test – Does It Work?

Sure… changing your answer helps your chances of being right but not having to change your answer is even better. It’s more results with less stress. Here are a few articles that can help you get started improving your study routine:

Get Better Grades: 17 Scientific Strategies To Hack Studying

The Perfect Test Score Problem

Study Motivation Made Easy

How To Study A Textbook (Without Banging Your Head Against It)

Ever change your answer and get it wrong? Ever not change your answer and get it wrong? Ever change your answer from a wrong one to another wrong one? Tell your story in the comments below.

Changing Answers On A Test – Does It Work?

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8 thoughts on “Changing Answers On A Test – Does It Work?

  • August 19, 2021 at 4:54 pm

    Great post. I am facing a few of these issues as well..

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  • January 9, 2017 at 5:03 pm

    Sounds like I need to improve my studying.

    I’m always struggling to figure out which answers are right. It’s good to know which direction to pick though.

  • January 9, 2017 at 4:22 pm

    I’m willing to bet I can break these odds! haha I’ll still get them wrong.


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