When an observer is not concealed, the findings may be biased because of which of the following?
A) Reactivity
B) Ethical problems
C) Lack of mobility
D) Acquiescence response set bias
A
Feedback:
Researchers do not always tell people they are being observed, because awareness of being observed may cause people to behave atypically. A behavioral distortion due to the known presence of an observer is called reactivity. It is not an ethical problem or lack of mobility. Acquiescence response set bias is a tendency to agree with statements regardless of their content by some people (yea-sayers). The opposite tendency—to disagree with statements independently of the question content—is less common.
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