Testing is critical to modern technological and decision-making systems, from college admissions to nuclear weapons. Tests may include many different things: detection devices, assays, simulations, diagnostics, and rehearsals. Standardized tests play a major role in education, professional licensing, clinical medicine, and environmental regulation, even when their predictive value is acknowledged to be limited. Is testing a single coherent activity, albeit with variants, or a disparate collection of practices and tools lumped together under the same name? Why do we test? We will explore the histories of testing to answer these questions.
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