*2.2. Experimental Design*

Subjects completed four social dilemma tasks: The *dictator game*, the *ultimatum game* with role uncertainty (i.e., subjects made choices in the role of both the *proposer* and the *recipient*) and decided whether to engage in *third-party punishment* by choosing if and how much to sacrifice to sanction a *dictator*, who kept the entire endowment to herself in the *dictator game*. After completing the four social dilemma tasks, subjects continued to the second part of the experiment to complete the three-item CRT. Lastly, subjects were to state their gender, line of study and their email address in order to potentially get paid for participating in the experiment.

In the following, I will present each social dilemma task as well as the three-item CRT. The experimental instructions are reproduced in Appendix A.
