In a study using a true experimental design, which of these methods would control for antecedent variables?
A) Manipulation of the independent variable
B) After-only data collection
C) Intervention fidelity
D) Random assignment to groups

Question

Quizplus · Accepted Answer

Antecedent variables are variables that occur before the independent variable is manipulated and could potentially influence the outcome of the study. One way to control for antecedent variables is to use random assignment to groups, which involves randomly assigning participants to different groups, such as an experimental group and a control group. This helps to ensure that any pre-existing differences between the groups are distributed randomly, and thus unlikely to be the cause of any differences observed in the outcome measure.
A) Manipulation of the independent variable is necessary to test the research hypothesis, but it does not specifically control for antecedent variables.
B) After-only data collection refers to collecting data only after the manipulation of the independent variable has taken place, which is not related to controlling for antecedent variables.
C) Intervention fidelity refers to how closely the intervention is implemented according to a specific protocol, and it does not specifically address the control of antecedent variables.

In a Study Using a True Experimental Design, Which of These