The goal of random assignment in formal experiments is to
A) ensure that the correct statistical procedures will be followed.
B) make sure that the sample is representative of the population.
C) make sure all the students signed up get a chance to participate.
D) make the groups roughly equal prior to the start of the study.

Question

Quizplus · Accepted Answer

Random assignment is used to distribute participants randomly to different groups in a study. The goal of this is to ensure that groups are roughly equal prior to the start of the study to minimize the effects of confounding variables and increase the internal validity of the study. Option A is incorrect because random assignment does not determine the statistical procedures, it is the research question that dictates the statistical analysis. Option B is incorrect because the goal of a representative sample is achieved through random sampling, not random assignment. Option C is incorrect because all participants do not need to have an equal chance of participating, random assignment is used to ensure that participants are assigned to groups in a way that minimizes bias, not necessarily to ensure equal participation for all.

The Goal of Random Assignment in Formal Experiments Is to