Inquiry method effects on performance in a simulated business environment

The dialectical inquiry (DI) and devil's advocate (DA) techniques have been offered as two options for providing information to the decision maker. Several prior studies have not resolved the relative advantages between these two “inquiry methods.” This paper reports two studies that involve a business simulation task and an inquiry method manipulation. In the first study with student subjects as decision makers, the DA advice was more useful than the DI advice in a situation wherein plant and work force expansions were frequent. In the second study with experienced managers, very few expansion decisions were made, and the nature of DA or DI advice made no significant difference. Instead, a recommendation to engage in a high profit margin, low volume strategy proved useful in some conditions.