Playing with a stopwatch.

If you click the button labeled "go" twice, the JavaScript for this WEB page will determine the time elapsed between the clicks and display it in the window labeled "Seconds between clicks". If you do this a number of times, the script will keep track of the intervals and, in response to the "Compute" button, report simple statitsics about the intervals.

So here's the game: pick a time interval (1 second, say) as your goal and try to train yourself to click the "go" button at 1 second intervals. Make at least 10 clicks. By looking at the results presented by the "Compute" button, you can determine how fast you've learned to perform the 1-second clicks.

How does your learning time depend on the length of the interval learned? Can you see where fatigue and/or boredom set in? Why don't you "borrow" the JavaScript from this page (Use: View Document Source) and modify it to also show the standard deviations of the elapsed times for different parts of the training period?