Fig 2. Selected images from the child-friendly reward task.

Written and verbal instructions were provided to all participants. Participants progressed through the instruction screens at their own pace. (a) Welcome screen explaining the task. Participants are verbally instructed that they will be traveling to three different islands (turtle, parrot, monkey) to collect coins. (b) Description of win, loss, and neutral trials. Participants are told that they will see a genie if they win coins, a pirate if they lose coins, and a palm tree if they did not win or lose coins. (c) Description of reward magnitude Participants are instructed that they can win or lose large (i.e., +100 points or -50 points) or small (i.e., +20 points or -10 points). (d) Final screen. At the end of the task, participants travel to treasure island and are informed of their total winnings.