One of the essential differences between experimental research and correlational research is that
A)in experimental research all variables are measured, whereas in correlational research at least one variable is manipulated
B)in experimental research, subjects are randomly assigned to the levels of the independent variable
C)experimental research uses random sampling, whereas correlational research uses random assignment
D)experimental research has higher external validity than correlational research

Question

Quizplus · Accepted Answer

In experimental research, subjects are indeed randomly assigned to different levels or conditions of the independent variable. This random assignment is crucial for establishing cause-and-effect relationships, as it helps ensure that any differences observed between groups can be attributed to the manipulation of the independent variable rather than pre-existing differences among participants.

One of the Essential Differences Between Experimental Research and Correlational