Decision aids lead to effort savings but not improved decision performance.
The experiments studied how decision aids affect the effort put in by decision makers. Contrary to the belief that more tools lead to better decisions, the results showed that decision aids actually reduced the effort spent by decision makers. The aids were used to replace, not add to, the decision makers' efforts. In fact, the decision aid accounted for a significant portion of the information processed by the decision makers. This effect was more noticeable when there were more options to choose from.