Keeping a participant unaware of the purpose of the study in which they are participating is one way to help reduce the ___________ effect in research.
A) placebo
B) observer-expectancy
C) subject-expectancy
D) demand

Question

Quizplus · Accepted Answer

Subject-expectancy effect occurs when participants have certain expectations or beliefs about what they think the study is about or what the experimenter wants them to do. By keeping the participant unaware of the purpose of the study, these expectations and beliefs can be reduced, thereby reducing the subject-expectancy effect. Placebo, observer-expectancy, and demand effects are different types of biases that can also influence research, but they are not directly related to participant understanding of the study's purpose.

Keeping a Participant Unaware of the Purpose of the Study