Figure 1.

Task structure (A) schematic of an individual decision tree with three stages. Thick arrows indicate possible decision actions (left or right), and thin arrows indicate probabilistic transitions. The transition probability (0.9, 0.1) and (0.5, 0.5) corresponds to a low uncertainty and a high uncertainty environment, respectively. (B) Sample trial procedures. On each trial, the subject views a series of fractal images along with collection boxes on the computer screen. The collection boxes appear in different colors that indicate the colors of coins that will be rewarded in the specific goal condition (left) or a white collection box which will result in a reward for all colors in the flexible goal condition (right). After the second decision, the reward is displayed as the color and number of coins. Figure adapted from Weissengruber et al. (26).