A measure of risk-taking behavior where participants inflate virtual balloons to earn points, balancing reward against the risk of the balloon popping.

PEBL's "Bechara Gambling Task": an independent implementation of Bechara et al.'s so-called "Iowa Gambling Task". Choose which option and receive rewards and costs. This version, by Peter Bull, is a substantial improvement over the original PEBL test, which is still available as iowa-old.pbl if needed.

An 'urns' or 'marbles' task examining decision-making under uncertainty and impulsivity. Participants sample colored marbles from a hidden urn and must decide which of two urns (with different color distributions) is being used. More evidence-gathering improves accuracy but costs points.