Question

test content
page 30 of 50
question 30
2 points
simply expecting something to happen can make it happen. this describes ______.
participant bias
placebo effect
observer bias
experimenter bias
clear selection

Explanation:

The placebo effect refers to the phenomenon where a person's belief or expectation that a treatment (or an event) will have an effect leads to the actual occurrence of that effect, even if the treatment itself has no inherent therapeutic (or causal) properties. Here, simply expecting something to happen makes it happen, which matches the definition of the placebo effect. Participant bias is about participants' actions/responses being biased, observer bias is about observers' perception/interpretation being biased, and experimenter bias is about experimenters' influence on results. So the correct option is the one related to the placebo effect.

Answer:

B. placebo effect