Co-opetition Interactive is © 1996 by the Authors.
Here's a short exercise that we use as a tool to help improve decision-making skills. We have in mind a certain rule governing any sequence of three numbers. We'll start by telling you that (2, 4, 6) obeys the rule. Can you guess what the rule is?
You can try any three numbers you wish. Type the numbers in, then click on "test numbers" and the application will tell you whether the sequence obeys the rule. You can do this test any number of times that you like. Once you think you know the rule, make your guess. But be aware that you get only one guess.
"Judgement in Managerial Decision Making," by Max Bazerman (Wiley 1998), pp. 35-36.
"On the Failure to Eliminate Hypotheses in a Conceptual Task," by P.C. Wason, Quarterly Journal of Experimental Psychology, 12, 1960, pp. 129-140.