What you have to do

You will be tasked with guessing the randomly selected urn in 30 different 'rounds'. There are still two urn choices: Urn A and Urn B. Remember the chosen urn is randomly selected by the computer before each round. If your guess is correct you will earn 1 experimental dollar. This means that you can earn up to 30 experimental dollars from this part based on how many correct guesses you make. Experimental dollars are still exchanged at a rate of 4 experimental dollars = 1 U.S. dollar.

What you will know about the urn that is chosen

To help you make your guess we will once again let every person privately watch a ball get randomly drawn from the chosen urn. The urns have the same balls inside as in Part 2, which is shown below.

This part of the experiment differs in a three ways from Part 2. First, each person will watch their random ball drawn and make their guess about the chosen urn one at a time. The order that all 10 of you will make your guess is randomly set at the beginning of each round by the computer. Nobody else will be able to see the ball. Second, in the order that was randomly set for each round, the guess that each person makes will be made public to everyone in the session . You will all be able to see a table that is updated with every submitted guess. Third, your payoff is only based on if you guess correctly.

The Experiment Procedure

The following experiment procedure summarizes all this information.

1. At the beginning of each round the computer will randomly choose an urn (Urn A or Urn B). This will not change the entire round.
2. The computer will randomly generate the order people will make their guesses about the urn. Everyone then finds out what spot they have for the round.
3. The first person privately watches a ball drawn from the selected urn. The composition of the urn is determined only by which urn was selected.
4. The first person guesses which urn was chosen (Urn A or Urn B). After clicking submit their turn is over.
5. It is now the second person's turn. They follow steps 3-4 exactly the same as the first person. However, they also can see the first person's guess about the chosen urn.
6. Everyone sequentially (based on the random order set by the computer for the round) follows steps 3-4. They will be able to see all the guesses made before them.
7. Once everyone is finished with the round, the computer will show everyone which urn was actually chosen. If it was Urn A it will say so and if it was Urn B it will also say so.
8. We begin the next round, starting with step 1. This procedure will be followed for a total of 30 rounds.