In the context of decision making under risk, additional information can be seen as a resource for the improvement of decision quality. The value of this improved quality is usually measured using Marschak´s concept of the value of information. From this point of view, human information processing can easily be understood as a production process transforming the information processing activity into improved decision quality. The production function of this activity therefore assigns the value of information to each amount of information processing with respect to the decision problem at hand.