This test is for measuring the reaction time. It is called reaction time test. This is a computer based test. It is used to test human movement perception, specially speed and time perception. This test is performed to test your quick response time.
When a light blinks on the monitor, see the color of the light. Release the blue key, press the key which corresponds to the light ('R' key for Red/'G' key for Green/'Y' key for Yellow) and come back to blue one immediately. Do it as fact as possible . The test goes on for about 1-2 minutes. Don't press wrong color key at any cost. Although nobody is sure, but it is said that 100% accuracy is required in this test.