The key feature of an experimental design that distinguishes it from a quasi-experimental design is the ______.
A) longitudinal measurement of the dependent variable
B) random assignment to two or more groups
C) comparison of the dependent variable before and after the independent variable
D) elimination of error due to chance

Question

Quizplus · Accepted Answer

The key feature that distinguishes an experimental design from a quasi-experimental design is the random assignment of participants to two or more groups. This allows for the control of confounding variables and ensures that differences between groups can be attributed to the manipulation of the independent variable, rather than to pre-existing differences between the groups.

The Key Feature of an Experimental Design That Distinguishes It