The Online Reaction Time Test

Instructions:

1. Click the large button on the right to begin.
2. Wait for the stoplight to turn green.
3. When the stoplight turns green, click the large button quickly!
4. Click the large button again to continue.

Hints:

• The stoplight may take up to seven seconds to change. The amount of time is random.
• You may press any key, instead of clicking the mouse button, if you prefer.
• You will be tested five times, and your average reaction time will be calculated.

General permission to use this timer:

A number of people have e-mailed me to ask permission to use this timer in school projects, scouting events and similar non-profit situations. I hereby give general blanket permission ("Yes") for these types of uses, under the following conditions:

• Not used for profit or commerce.
  
  
• Users accept the fact that I have made no effort to test, certify, or corroborate the results of the timer. The timer is a javascript programming exercise, not a scientific instrument. In writing this javascript, I have relied upon the javascript spec and the internal computer clock. I have coded the javascript as best as I could, but I have not timed the timer.
  
  
• Users acknowledge that I do not guarantee the accuracy of the timer. The timer is only as accurate as the computer, browser and javascript engine processing the code. When more applications are running on the same computer, the timing quality deteriorates. Computers which are online, or which are playing cds or dvds, or which receive mail during timing, may lose accuracy. Other similar conditions cause the timer's accuracy to diminish. (Try to minimize these events.)
  
  

Users accepting the above conditions can footnote me as follows:

The Online Reaction Time Test, © 2002 by Jim Allen, gywh.com

Thanks!
Jim Allen

Using the Reaction Time Test offline:

A number of people have e-mailed me to ask how they can use this timer offline. Apparently when one uses the IE browser's Save command, it doesn't collect all the files needed.

So to make this easier, here are links to ALL the files used in the Reaction Time Test, and you can collect them yourself. The Reaction Time Test script expects to find all the images in an 'images' subfolder, directly below the folder holding the html file.

rttest01.html
images/rttest_stoplight_yellow.gif
images/rttest_stoplight_red.gif
images/rttest_stoplight_green.gif
images/rttest_wait.gif
images/rttest_ready.gif
images/rttest_go.gif
images/rttest_done.gif
images/rttest_continue.gif
images/jswb1.gif
images/transparent.gif
images/rttest.gif


Thanks!
Jim Allen