A researcher who wants to conduct a study in the local high school finds that she must use volunteers rather than intact class groups.In this case, the researcher should
A) make sure to use a sample of at least 30 or more subjects.
B) control for the subjects' willingness to volunteer.
C) keep the volunteer subjects naive as to the purpose of the study.
D) determine the extent to which volunteers may differ from nonvolunteers on important variables.

Question

Quizplus · Accepted Answer

When using volunteers rather than intact class groups, it is important to determine the extent to which they may differ from nonvolunteers on important variables. This will help ensure that the sample is representative of the population and reduce the potential for selection bias. While using a sample of at least 30 or more subjects is generally a good practice, it is not directly related to the issue of using volunteers. Controlling for the subjects' willingness to volunteer and keeping them naive to the purpose of the study are also important considerations, but they are not as critical as ensuring that the sample is representative. Therefore, option D is the best choice.

A Researcher Who Wants to Conduct a Study in the Local