Colorful Reaction Time Tester
Use this test to find out how fast you respond to different colors.
First choose a background color from the table. When you press the
"Start" button, the background of your computer monitor will change color
after a delay. When the color changes, click on the "Stop" button. See
if there are any differences in your reaction time to the different
NOTE: this test does not work if you are using an Internet EXPLORER browser. All versions of NETSCAPE will work.