PARTICIPANTS We collected data from 200 participants recruited from our participant pool. The participant pool consists mainly of university students. Participants were compensated for their participation in the whole set of studies which took approximately 50 minutes by 100 CZK (~4EUR, 4USD). Moreover, in the sorting task related to this study, participants could gain points for themselves and for a Czech charity. At the end, each participant had 1/13 chance to be randomly chosen. For chosen participants, points were converted to CZK at a rate 1000 points = 100 CZK. The amount converted from points that participants gained for themselves were added to the baseline reward of 100 CZK. The amount covnerted from points that participants gained for the charity was summed and transferd to a charity bank account after the data collection was completed. MATERIALS - OVERVIEW Rules of the sorting task were first explained to participants. They were also provided with an annotated screenshots from the task showing results of various possible classifications of a given object. Finally, the most essential instructions were repeated. The complete wording of the instructions (in Czech) can be found in the Materials node. At the end of the whole study, participants were asked what they believe was the aim of the task and about their perceptions of misclasification in order to get a bribe and of correct classification in order not to cause a loss to the third party. The exact wording can be found in the Materials node as well. DESIGN Participants were asked to sort 100 objects appearing one after other on their computer screens. The objects were combinations of three shapes and three colors (e.g. blue circle, yellow square, orange triangle and so on). The sorting was done by pressing one of three buttons on a keyboard. Each of three buttons was associated with a combination of color and shape. This association changed after each classification. For each sorted object, particiapnts received a fixed amount of 3 points. At the begining of the task, 2000 points were assigned to a well-known Czech charity. When an object was sorted to a corresponding color, the amount of points for the charity remainded unchanged. However, when an object was classified to a different color, 200 points were subtracted. (It was possible to reach negative values.) Sometimes (with a probability 0.2), a number was written inside an object. When such object was sorted to a corresponding shape, number of points equal to the written number was gained by a participant. (If that meant classification to an uncorresponding color, 200 points were still subtracted from the amount assigned to the charity.) During the whole task, participants were informed about a number of the current trial (out of 100), actual points gained from oneself (from correct classifications and possibly bribes) and actual points gained for the charity. There were two different conditions based on from what set were values of bribes generated: *higher bribes condition* [100, 110, 130, 150, 170, 190, 200, 300] and *lower bribes condition* [10, 30, 50, 80, 170, 190, 200, 300].