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About: Researcher degrees of freedom     Goto   Sponge   NotDistinct   Permalink

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Researcher degrees of freedom is a concept referring to the inherent flexibility involved in the process of designing and conducting a scientific experiment, and in analyzing its results. The term reflects the fact that researchers can choose between multiple ways of collecting and analyzing data, and these decisions can be made either arbitrarily or because they, unlike other possible choices, produce a positive and statistically significant result. As such, researcher degrees of freedom are often related to data dredging and other questionable research practices. Their widespread use represents an inherent methodological limitation in scientific research, and contributes to an inflated rate of false-positive findings. They can also lead to overestimated effect sizes.