Question

In a randomized control trial, if the participant and the physician/researcher don't know to which group the participant is assigned, but the data analyst does, we say the study is:

A. Single-blind.
B. Double-blind.
C. Triple-blind.
D. Open-label.

Answer 1

A double-blind study is the type of study described in this question, where both the participant and the researcher are unaware of the group assignment.

Step-by-step explanation:

A randomized control trial where the participant and the physician/researcher don't know the group assignment, but the data analyst does, is called a double-blind study.

In a double-blind study, both the participants and the researchers are unaware of which group the participants are assigned to.

This type of study is commonly used in clinical trials to reduce bias and ensure that the results are reliable and accurate.