Which term describes a research design in which neither the participant nor the experimenter observing the participant knows which participants were given an active substance and which were given a placebo?
A)Clinical trial
B)Open trial
C)Double-blind procedure
D)Prospective cohort study

Question

Quizplus · Accepted Answer

The double-blind procedure involves keeping both the participant and the observer unaware of who received the active substance and who received the placebo. This design helps to eliminate bias in the results and increase the validity of the study. Clinical trials, open trials, and prospective cohort studies may or may not use the double-blind procedure.

Which Term Describes a Research Design in Which Neither the Participant