Which of the following is true of an experimental study? Select all that apply
A) It includes an intervention or treatment.
B) It is a type of qualitative research.
C) It can be called a clinical trial.
D) It tests causal relationships.
A, C, D
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Experimental studies are a type of quantitative, not qualitative, research. Experimental studies include an intervention or treatment, can be called a clinical trial, and test causal relationships.
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