One-reason decision making is a label for a class of fast and frugal heuristics that base decisions on only one reason. These heuristics do not attempt to optimally fit parameters to a given environment; rather, they have simple structural features and bet that the environment will fit them. By...

This chapter focuses on the recognition heuristic and the less is the more effect. Instead of being unboundedly rational, it is ecologically rational, that is, reasonable with respect to some environments but not others. There are domains in which the recognition heuristic will not work. A wise...