In this test, you will see a random number of circles on screen for 600 milliseconds (0.6 seconds). Your job is to decide whether there were more yellow circles or more blue circles. Make your decision based only on the number of circles and not the sizes of the circles, as circle sizes will be randomly mixed.
Please make sure the entire blue rectangle is visible and centered on your computer screen, then press SPACE to see an example.
Please do not press the BACK or RELOAD buttons as this will restart the test.
Below, you see an example of a display of circles that you might encounter in this test. In this display, there are more yellow circles than blue circles. If you saw this display, you would press 'Y' on your keyboard to say that you saw more yellow circles.
If there were more blue circles than yellow circles, you would press 'B' on your keyboard.
Press SPACE to continue.
Before we begin the actual test, we would like you to do a short practice. In the beginning of the practice, the circles will be shown on screen for an unlimited amount of time. Press 'Y' on your keyboard if you saw more yellow circles, and press 'B' if you saw more blue circles.
Press SPACE to begin the practice session.
In this next part of the practice, we're going to speed things up. Now, the circles will only be shown on screen for 600 milliseconds (0.6 seconds).
If you are uncertain whether there were more yellow circles or blue circles, take your best guess.
Press SPACE to continue.
Now we are going to start the actual test. Remember to press 'Y' on your keyboard if you see more yellow circles, and press 'B' if you see more blue circles. Please respond as fast as you can without losing accuracy. You can respond before the dots disappear if you are confident in your answer. After replace me test trials, the first half of the test will be completed.
Please make sure the entire blue rectangle is visible and centered on your computer screen, then press SPACE to begin the test.