Question

In a ___ study, the participants do NOT know if they are part of the control group or the experimental group. Only the experimenter knows who is in each group.

a) Single-blind
b) Double-blind
c) Triple-blind
d) Open-label

Answer 1

In a double-blind study, the participants do NOT know if they are part of the control group or the experimental group. This helps prevent bias in the experiment. Double-blind experiments are considered the gold standard in clinical trials of vaccines, therapeutic drugs, and other medical treatments.

Step-by-step explanation:

In a double-blind study, the participants do NOT know if they are part of the control group or the experimental group. Only the experimenter knows who is in each group.

Double-blind experiments are used in clinical trials of vaccines, therapeutic drugs, and other medical treatments to prevent bias in the outcome. This type of experiment is considered the gold standard in medical research.