In Thomas Kuhn's account, research conducted within an accepted framework of exemplary achievements, problems and methods.[ref]
The Structure of Scientific Revolutions by Thomas Kuhn. Introduction
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Normal science is a term coined by philosopher Thomas Kuhn in his influential work "The Structure of Scientific Revolutions," published in 1962. Normal science refers to the regular work of scientists within a prevailing framework or paradigm. During periods of normal science, researchers operate under a common set of assumptions, theories, and methodologies that are widely accepted within the scientific community.