lurking variable

lurking variable

Clinical trials A variable in a study population that is undetected/unsuspected and may alter interpretation of causal relationships. See Observational study.
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In both instances, the researcher needs to keep in mind the potential for lurking variables, creating a syndrome frequently referred to as Simpson's paradox (Demers & Rossmo, 2015; Fu, et al.
The researcher intended to combine the data sets from the two semesters, but needed to be mindful of the potential for confounding or lurking variables.
The order of the cures was randomized by Design-Expert as insurance against lurking variables, such as machine wear.