Quiz: What Is a Blinded Clinical Trial?

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1. Q1.What does blinding mean in a clinical trial?

   ASome people involved do not know who is getting which treatmentBParticipants must close their eyesCNo one records any resultsDThe trial has no treatment

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2. Q2.In a single-blind trial, who does not know their group?

   AThe researchers onlyBNo oneCThe sponsorDThe participants

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3. Q3.In a double-blind trial, who does not know the assignments?

   ANeither the participants nor the researchers working directly with themBOnly the participantsCOnly the researchersDOnly the sponsor

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4. Q4.Why is blinding used?

   ATo make the trial cheaperBTo reduce bias so findings reflect the treatment, not expectationsCTo hide results from patients foreverDTo speed up enrollment

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5. Q5.Does blinding put safety at risk?

   AYes, no one can ever find out the treatmentBYes, safety is ignoredCNo; there is always a way to quickly reveal the treatment if a concern arisesDOnly in single-blind trials

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This quiz checks understanding of educational content only. It is not medical advice. Read: What Is a Blinded Clinical Trial?.