The tasks were developed using Pygame 1.9.1. Participants played two different games: a numerical game termed the “harbormaster game” and a visuo-spatial game termed the “nursery game.” In the harbormaster game, participants were asked to play the role of a harbormaster at a busy port. As such, participants were presented with three boats arriving at the port on each trial, and asked to decide which of the three boats should enter the port (by selecting a boat using an MR-compatible mouse; NAtA technologies, FOM-2B-10B fMRI Mouse).

http://europepmc.org/article/med/25309380