A double-blind test involves dividing patients into two groups: one receiving the active drug and the other a placebo. Neither the patients nor the doctors know who is in which group until the results are assessed, which helps prevent observer bias and minimize the placebo effect.
A double-blind test involves giving 50% of patients the active drug and 50% a placebo, with neither patients nor doctors knowing who receives which until after results are observed, to prevent bias and reduce the placebo effect.
| Front | What is a double blind test? |
|---|---|
| Back | 50% of patients are given the active drug and 50% are given a placebo (looks identical to active drug but is uneffective)
The patients and doctors don't know which group has taken the active drug until after the results have been observed
This prevents observer bias and reduces the placebo effect |
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Clinical phase trials tested people find group evaluate
Previous card: Features drug effective prevent cure disease aimed safe
Up to card list: Biology Topics 1-9 GCSE