Three key elements of control that allow researchers to draw cause-and-effect conclusions are
A) randomization, manipulation, and variation.
B) assignment, manipulation, and comparison/control.
C) randomization, manipulation, and comparison/control.
D) randomization, condition, and comparison/control.

Question

Quizplus · Accepted Answer

Randomization ensures that individuals in the different groups being compared are similar in all aspects except for the variable being manipulated. Manipulation allows researchers to control and systematically vary the independent variable. Comparison/control groups allow researchers to compare the outcomes of different groups, one of which has been manipulated. Together, these three elements allow researchers to draw cause-and-effect conclusions.

Three Key Elements of Control That Allow Researchers to Draw