In a(n) ________ study, subjects are randomized into either the treatment group or the control group; this type is considered among the most valid of studies.
A) experimental
B) quasi-experimental
C) observational
D) retrospective

Question

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An experimental study involves randomly assigning subjects into a treatment group (which receives the intervention or treatment being studied) and a control group (which does not receive the intervention or receives a placebo). This is considered the most valid type of study because it allows for establishing cause-and-effect relationships between the intervention and the outcome.

In A(n) ________ Study, Subjects Are Randomized into Either the Treatment