Multiple choice general knowledge

In a double blind clinical trial:

  1. the patients do not know which treatment they receive

  2. each patient receives a placebo.

  3. the patients do not know they are in a trial.

  4. each patient receives both treatments

  5. the clinician assessing the patients' condition does not know which treatment the patient
Reveal answer Fill a bubble to check yourself
A,E Correct answer
Explanation

In double-blind trials, neither patients nor assessing clinicians know which treatment each patient receives, minimizing bias. This eliminates placebo effects and observer bias. Not all patients receive placebo (B), patients know they're in a trial (C), and patients don't receive both treatments (D).

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