Question

Which of the following situations most likely represents observer effect bias?(1 point)
Responses

Participants in a study about healthy eating habits exaggerate how much fruit they consume.
Participants in a study about healthy eating habits exaggerate how much fruit they consume.

The scientist's expectations influenced their interpretation of the experimental results.
The scientist's expectations influenced their interpretation of the experimental results.

A poll asks, "Do you support the wasteful spending of taxpayer money on unnecessary projects?"
A poll asks, "Do you support the wasteful spending of taxpayer money on unnecessary projects?"

A survey about political opinions has a low response rate among young people.

Answer 1

Participants in a study about healthy eating habits exaggerate how much fruit they consume.

Explanation: Observer effect (Hawthorne effect) occurs when participants change their behavior or responses because they know they are being observed. Other options match different biases (scientist expectations = observer/experimenter-expectancy bias; loaded question = wording bias; low youth response = nonresponse bias).