My research focuses primarily on problems of explanation and modelling in science, and on related questions about reduction, emergence and other inter-theoretic relations. These problems are widespread in different areas of science, appearing in discussions of the relationship between different branches of physics, in arguments about the significance of individuals and groups in evolutionary biology, and in problems involving the relationship between psychology and cognitive states and the underlying brain states and processes that realize them. My research concentrates on the role that scale plays in these problems, and in particular on the …

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