Two views of the relationships between theory and empirical research are described as Aristotelian and Galilean, following Cassirer 1923) and Lewin (1935) . The two conceptions of theory and research differ with respect to the nature of the conceptual models they employ and the roles and expectations they hold for empirical research. These matters are discussed in the context of research on teaching. The Aristotelian versus Galilean distinction is held to be more fundamental to the conduct and interpretation of such research than other, more frequently discussed contrasts such as descriptive/explanatory, qualitative/quantitative, discovery/verification, or positivist/constructivist. The central claim is that all extant programs of research on teaching inappropriately construe research on teaching as primarily an empirical enterprise, leading to an overemphasis on methodology.
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