Figure 8

Respondents’ preference and perceived helpfulness of two different types of map content: maps depicting a distribution of probabilities of reaching and exceeding a fixed ash threshold, such as 10 mm (fixed ash threshold), and maps depicting a distribution of ash thicknesses expected at a fixed probability threshold, such as 25% (fixed probability threshold) (see Figure 3 ). Both types of content were viewed as helpful to some degree, and no statistically significant difference exists for preference between receiving a fixed ash threshold map, fixed probability threshold map, or one of each (see text for Pearson’s chi-square test values).