Sixth-Grade Students' Epistemologies of Science: The Impact of School Science Experiences on Epistemological Development

Previous studies have documented that middle school students have a limited "knowledge unproblematic" epistemology of science (i.e., scientists steadily amass more facts about the world by doing experiments) with no appreciation of the role played by scientists' ideas in guiding inquiry. An important question concerns to what extent students this age and younger are ready to restructure their epistemological views to focus on more "constructivist" issues: the conjectural, explanatory, testable, and revisable nature of theories. This study tests the claim that even elementary school students can make significant progress in developing a more sophisticated, constructivist epistemology of science, given a sustained elementary school science curriculum that is designed to support students' thinking about epistemological issues. To assess the impact of elementary science experiences on students' epistemological views, 2 demographically similar groups of 6th-grade students were individually interviewed using the Nature of Science Interview developed by Carey and colleagues (Carey, 1991; Carey, Evans, Honda, Jay, & Unger, 1989). Both groups had experienced sustained elementary science instruction; 1 taught from a constructivist perspective and 1 taught from a more traditional perspective. We found that students in the more traditional science classroom had developed a knowledge unproblematic epistemology of the type previously reported by Carey et al. (1989). In contrast, students in the constructivist classroom had developed an epistemological stance toward science that focused on the central role of ideas in the knowledge acquisition process and on the kinds of mental, social, and experimental work involved in understanding, developing, testing, and revising these ideas. We conclude that elementary schoolchildren are more ready to formulate sophisticated epistemological views than many have thought. We discuss how these findings relate to the broader epistemological literature, and the features of the constructivist classroom environment that may have supported the development of these sophisticated understandings.