CLICK HERE TO START THE SCREENX EXERCISE Final Instructions Once you start the actual test, you will be given a minute at the beginning to get used to the image again and to practice clicking on the “Difference Detected” button.

You will then see a graphic with the words “TEST WILL NOW START” as shown below:
When you see this graphic the practice is over and your performance will now be recorded.

Once you click on the button below, you must complete the test. You will not be given another opportunity. Do not use the "back" button on your browser, or you will get locked out of the test.