Which of the following is invariably present in quasi-experimental research?
A) A control group
B) An intervention
C) Matching of subjects
D) Randomization
B
Feedback:
Quasi-experiments (trials without randomization) involve an intervention but lack randomization and, sometimes, a control group. Strong quasi-experimental designs introduce controls to compensate for these missing components. Matching of subjects is a method of controlling confounding variables by consciously forming comparable groups, which is used in some, but not all, quasi-experiments.
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