In the scientific method, an experiment is an empirical procedure that arbitrates competing models or hypotheses. Researchers also use… See more

Experiments might be categorized according to a number of dimensions, depending upon professional norms and standards in … See more

By placing the distribution of the independent variable(s) under the control of the researcher, an experiment—particularly … See more

• Allegiance bias
• Black box experimentation
• Concept development and experimentation See more

One of the first methodical approaches to experiments in the modern sense is visible in the works of the Arab mathematician and scholar Ibn al-Haytham. He conducted his… See more

An observational study is used when it is impractical, unethical, cost-prohibitive (or otherwise inefficient) to fit a physical or social system into a laboratory setting, to completely control … See more

• Dunning, Thad (2012). Natural experiments in the social sciences : a design-based approach. Cambridge: Cambridge University… See more