The equivalence of the experimental and control groups in an experiment
A) is not guaranteed by the use of random assignment procedures.
B) is guaranteed by the use of random assignment procedures.
C) is not affected by the size of the total sample from which experimental and control groups will be formed.
D) does not affect the internal validity of an experiment.

Question

Quizplus · Accepted Answer

Random assignment procedures aim to create equivalent groups by distributing potential confounding variables evenly across experimental and control groups, but they do not guarantee equivalence due to the possibility of chance imbalances.

The Equivalence of the Experimental and Control Groups in an Experiment