The nurse in the psychiatric unit is involved in a research study for a depression medication. In the study, patients are randomly assigned to one depression medication and the other group is receiving no medication to treat the depression. What method of research are the patients involved with?

A) Descriptive
B) Correlational
C) Quasi-experimental
D) Experimental

Experimental tests an intervention and includes both a control group and random assignment. This research study tests an intervention and includes both a control group and random assignment. Descriptive defines the magnitude of a concept and its characteristics. Correlational determines association between or among variables. Quasi-experimental tests an intervention and lacks either a control group or random assignment.