Why does a good experiment include a control group?
A) it increases the number of people in the study, and hence, the generalizability of the results
B) it gives us information about how participants would perform without experiencing the experimental treatment
C) it eliminates the effects of external validity
D) control groups have been an established part of scientific tradition for many decades

Question

Quizplus · Accepted Answer

A control group is essential in an experiment because it serves as a benchmark to compare the effects of the experimental treatment against, allowing researchers to determine if the treatment has a significant effect.

Why Does a Good Experiment Include a Control Group