A ______ controls for both known and unknown confounding variables by ensuring that groups are equal before the experiment begins.
A) randomized control trial
B) double-blind experiment
C) match subjects design
D) longitudinal study

Question

Quizplus · Accepted Answer

A randomized control trial controls for both known and unknown confounding variables by randomly assigning participants to either the treatment or the control group, ensuring that groups are equal before the experiment begins. This randomization process helps to eliminate bias and makes it more likely that outcomes can be attributed to the treatment rather than to external factors.

A ______ Controls for Both Known and Unknown Confounding Variables