Fig. 1: Summary of the design.
From: Honour, competition and cooperation across 13 societies
In the contest game, participants (red avatar) invested money to attempt to take away the money from their game partner (competition decisions). All invested money would be lost. If a participant invested more than their partner, they could take all the money that their game partner did not invest. However, if both participants invested the same amount, they would each keep whatever money they had not invested. In the step-level PGG, participants (blue avatar) invested money (together with their game partner’s investment) to attempt to reach the provision points of the public good (cooperation decisions). The total amount invested by both participants was summed and compared to two provision points. If the total investment reached the first provision point of 12 MUs, each participant received 10 MUs plus any money they had not invested. If the total investment reached the second provision point of 16 MUs, each participant received 15 MUs plus any money they had not invested. In each round, participants faced a different game partner from the same society, with manipulated gender information (male, female or not provided). After data collection, participants’ decisions were asynchronously matched with another participant’s decisions, on the basis of the manipulated gender information, to compute game payments without deception (see also Methods).
