Volz, K. G., Schubotz, R. I., & von Cramon, D. Y. (2003). Variants of uncertainty in decision making and their cerebral correlates. In M. Ullsperger, & M. Falkenstein (Eds.), Errors Conflicts And the Brain: Current Opinions On Performance Monitoring (pp. 84-95). Leipzig: Max Planck Institute of Cognitive Neuroscience.