This study assesses and determines the factors that influence dispositions. To assess dispositions, the authors developed a series of micro-case scenarios. Their prior research showed the effectiveness of using scenarios to assess dispositions, but the authors also sought to understand the factors that influence dispositions. In this article, they describe the ways in which they used scenarios and present the findings of the analysis of candidates' responses. They examine experiences that influence candidates' dispositions, the role that teacher education plays in dispositional development, and the ways in which these findings can inform teacher preparation programs in their efforts to prepare candidates to work with diverse students. (Contains 1 figure.)