If it is necessary to use only volunteers in a research study, the best precaution is for the researcher to
A) consider whether volunteers are likely to differ from nonvolunteers on critical variables.
B) increase the sample size.
C) require a public commitment to participate.
D) keep the description of the study's purpose brief and matter-of-fact.

Question

Quizplus · Accepted Answer

Volunteers might have different characteristics or motivations compared to non-volunteers, which could introduce bias into the research. Recognizing and considering these potential differences is crucial for maintaining the validity and reliability of the study's findings.

If It Is Necessary to Use Only Volunteers in a Research