Researchers can "control" what in an experiment how?

Asked by arwen46 12 years ago 7/28/2013 2:05 AM

Last updated by anonymous 12 years ago 7/29/2013 5:27 PM

Answered by Dr. John Carmen 12 years ago 7/29/2013 5:27 PM

Researchers can "control" unwanted variables by using control groups to cancel their effects.