The design and procedures of the control treatment are exactly the same as in Fischbacher and Foellmi-Heusi (2013), in the experimental treatment the conventional die is replaced with a digital die: This experiment will be added to the end of other experiments since it only takes 10 minutes to conduct. After participants finished the first experiment, they are told that a second, very short experiment will follow and that this experiment has nothing to do with the experiment before. The task consists of completing a short questionnaire and afterwards determining the payoff for it by a die roll. Subjects are asked to report the first number they rolled, which determines the payoff: Reporting a 1 leads to a payoff of 1 euro, reporting a 2 leads to a payoff of 2 euros and so on until reporting a 5, while reporting a 6 leads to a payoff of 0.
There are two treatments, which are one-shot and designed in a between subject-design:
Control treatment: Conventional die
In the control treatment, subjects find a cup and a die on their table and are asked to use this die to determine their payoff. They are asked to remember and report the first number they rolled, but are told to roll the die a couple of times to check whether the die is fair.
Experimental treatment: Digital die
The experimental treatment is identical to the control treatment, but instead of a die on the table, subjects find a digital die on their screen which randomly shows a number between 1 and 6 after clicking on a button. In addition, subjects are told that every result of the digital die roll is stored, but not checked by the experimenter for the purpose of the payment.