Control groups are important in experiments because
A)they make calculations of the correlation coefficient possible
B)they provide a standard of comparison for the experimental group
C)they provide a needed comparison of the confounding variables
D)they decrease internal validity and external validity

Question

Quizplus · Accepted Answer

Control groups serve as a baseline or standard of comparison for the experimental group, allowing researchers to determine the effect of the independent variable being tested.

Control Groups Are Important in Experiments Because