Research on human judgment and decision making has been strongly guided by a normative/descriptive approach, according to which human decision making is compared to the normative models provided by decision theory, statistics, and the probability calculus. A common empirical finding has been that human behavior deviates from the prescriptions by normative models--that judgments and decisions are subject to cognitive biases.

It is interesting to note that Swedish research on judgment and decision making made an early departure from this dominating mainstream tradition, albeit in two...