Provides an innovative analysis of the nature and interplay of observation and conceptualisation. Radder shows that observation is always conceptually interpreted, and concepts affect the way observational processes are conducted in the first place.

Hans Radder is professor emeritus in philosophy of science and technology at the Department of Philosophy of VU University Amsterdam, Netherlands. He is the author of many articles and several books, including The World Observed/The World Conceived and The Material Realization of Science: From Habermas to Experimentation and Referential Realism, and editor of The Commodification of Academic Research: Science and the Modern University.