Types of Variables: Independent, Dependent, Control, Extraneous, Mediating, and Moderating
This video describes the types of variables that you may have in a study or causal model, as well as the concept of multidimensional variables. The PowerPoint can be downloaded here: https://www.researchgate.net/profile/...
The text comes from from Research Methods and Survey Applications by David R. Dunaetz. You can find a free pdf of this book by googling the title or you can buy a hard copy on Amazon.