The current study was aimed to elucidate the differences between addicts (primarily opiate) and non-addicts in risky decision making with a modified Cambridge risk task. The participants had to decide between a risky and a safe gamble based on their chance of winning which were either high (66%) or low (33%). Also the number of points to win/lose was different (2/2, 6/6, 2/6, or 6/2). The addicts group showed slower RT and more risky behaviour especially when the chance to win was low. However, when the chance to win was high, the non-addicts group took more risk than the addicts.
