In an experiment,control groups and random assignment are used to
A)improve internal validity.
B)increase statistical significance.
C)improve external validity.
D)minimize correlations.

Question

Quizplus · Accepted Answer

Control groups and random assignment are used to improve the internal validity of an experiment. Control groups allow researchers to isolate the independent variable and observe its effect on the dependent variable, while random assignment ensures that there are no systematic differences between the experimental and control groups. By controlling for extraneous variables, the internal validity of the experiment is improved, meaning that the results are more likely to accurately reflect the true relationship between the independent and dependent variables.

In an Experiment,control Groups and Random Assignment Are Used to