______ designs come the closest to true experiments, but they still lack ______ of participants to groups.
A) Experimental; random assignment
B) Quasi-experimental; systematic assignment
C) Quasi-experimental; random assignment
D) Preexperimental; random assignment

Question

Quizplus · Accepted Answer

Quasi-experimental designs come the closest to true experiments in terms of features such as manipulation of variables and measurement of outcomes, but they still lack random assignment of participants to groups. The randomized assignment is a defining feature of an experimental design that helps to reduce bias and increase internal validity. Therefore, option C is the best choice that correctly identifies the type of design and the missing feature. Option A is incorrect because it incorrectly suggests that experimental designs lack random assignment. Option B is incorrect because systematic assignment is not a viable alternative to random assignment for creating equivalent groups. Option D is incorrect because preexperimental designs lack both random assignment and adequate control groups.

______ Designs Come the Closest to True Experiments, but They