*2.1. Procedures*

Subjects were recruited during four lectures in Psychology, Political Science, and Economics at Aarhus University. Three of these four lectures were for second semester students. The students were orally encouraged to participate during the break of the course and a link to the survey was distributed online.

Subjects were incentivized through a lottery scheme. In total, seven subjects were paid on average DKK 50 (≈\$7.5) for completing the experiment and, in pairs, paid according to their choices in the task, for which they were drawn at random to receive payment. For each the *dictator game*, *ultimatum game*, and *third-party punishment task*, two subjects received payment. One subject was drawn to get paid for completing the CRT. For each correct answer on the CRT, one ticket was added to the bowl from where a subject was drawn. The subject received DKK 100 (≈\$15) for completing the CRT.
