Discover how control variables can help infer causality in statistics and why they're key to isolating variable effects.

Sorting by CONTROL variables is available for systematic and sequential selection methods, which include METHOD=SYS, METHOD=PPS_SYS, METHOD=SEQ, and METHOD=PPS_SEQ. Sorting provides additional control ...

Learn how to identify and control extraneous variables and confounding factors in your usability testing research design, and how to evaluate and improve your design quality.

Q: I read the “ Override and selective control ” article you wrote in 2017. I just have a couple of questions about the low-select control you and Simon Lucchini described when discussing override and ...

Greg: There are many interactions and interruptions when more than one flow affects a controlled variable. The solutions often cited in the literature are quite complicated, posing design and ...

A new study suggests that adolescents with certain psychopathic personality traits and weaker executive functioning skills ...

Focus your sellers on the variables that are always within their control: building trust, filling the pipeline and continuously qualifying prospects.

Using control variates is one method to achieve such variance reduction and is applicable in contexts where the random variable is unconstrained. To make it possible to use control variates with ...

The way we control the speed of fan motors or pump motors has tremendously changed in the past two decades with the introduction of variable-frequency drives (VFDs), aka variable-frequency controllers ...