If you didn't get here through The Three Doors of Serendip exhibit you may want to go there first.

start new game clears your current winnings and all playing history, while play again starts a new trial within a game, without clearing any winnings.

Playing
1) First choose a door by clicking on the numbered button (#1, #2, or #3) on any of the three doors. Your selection will be highlighted with two arrows.
2) Serendip will then open a different door to show you that the prize is not there. You are then given the chance to stay with your current door, or switch to the other remaining, unopened door. Click on either the stay or switch button.
3) Serendip then opens the door you've chosen and you either win (Serendip's logo) or lose (sad face). 4) To continue playing, click play again.
5) Use the auto-play: random, auto-play: stay every trial, and auto-play: switch every trial buttons to let the game run by itself. To stop auto-play click the appropriate button again.

- Your total trials and wins are displayed in the times played and wins monitor.

- The % wins of each strategy monitor plots the wins for all trials for which you've stayed and all trials for which you've switched.

Posted by Laura Cyckowski and Paul Grobstein on 19 August 2008. Applet created using NetLogo, the availability of which is gratefully acknowledged.