ABSTRACT

FIGURE 19.1. Knowledge-consistent and knowledge-inconsistent warnings for consumer products (Exp. 2, Hancock, Fisk, & Rogers, 2005).

warning, the greater the amount of mental effort necessary for processing, and the less likely the warning will be effective (Leonard, Otani, & Wogalter, 1999). The existence of a knowledge gap is particularly detrimental in situations where mental resources needed for successful warning processing are not available (i.e., novel emergency situations where reaction time must be quick, situations when nonrelated tasks must be performed).