**A.1 General instructions (Translation of the French instructions)**

Today, you will participate in an experiment. Your gain will depend upon your decision and the decisions of other participants in your group.

Since your gains depend on the decisions that you will make during the experiment, it is important to understand the instructions. Read them carefully. If you have any questions, raise your hand and the experimenter will come to your desk and provide answers.

#### **Your main task**

You and **2** other individuals are asked to choose between a safe action (**A**) and a risky action (**B**) for each of the **10** situations in the Table. All you have to do is to submit **A** or **B**. Gains will be determined by the following two factors:


At the time when you make your decisions, you will not know either of these two factors. You will not know the decision made by your two other playmates because your playmates are deciding at the same time as you. You will not know the value of the true state **Y** because you have to make your decision before this one is revealed. Therefore, you will need to decide based on the information that will be made available to you.
