Question

practice 1b
score: 34.67/50 answered: 23/25
question 24
in an experiment to see if aspirin reduces the chance of having a heart attack, a placebo is:
(a) the place where the subjects go when they have a heart attack.
(b) a dummy pill that looks like aspirin but has no active ingredients.
(c) a procedure for deciding who gets the aspirin treatment.
(d) the sampling method.
(e) the randomization procedure.

Explanation:

In medical experiments, a placebo is a substance with no therapeutic effect that resembles the real treatment (here, aspirin). It is used to control for the placebo - effect, where patients may feel better just because they think they are receiving treatment.

Answer:

B. a dummy pill that looks like aspirin but has no active ingredients.