Participants will be recruited from our laboratory subject-pool consisting mainly from students (approx. 70% female) of Czech universities. We aim to recruit 200 participants before exclusions (described in Analysis section). The experiment will be conducted in sessions of up to 14 participants. The exact number of participants may slightly differ from 200 depending on the number of people attending the last sessions. No data will be looked upon or analyzed before the end of the data collection. Only participants older than 18 years will be recruited. Participants will receive a chocolate bar for their participation.