For example, a professor can use another professor’s students granted that the recruitment occurs in a noncoercive manner (i.e., the professor is not present during recruitment and the other professor does not endorse the research project). A professor can also conduct the research after the semester has ended, when
the participants are no longer his students. Alternatively, if the research component is part of the regular curriculum, it might be possible to gain consent to use the students' data after the semester is over, e.g., by mailing them a consent form. Maintaining the anonymity of the participants also mitigates the classroom consent problem. For example a graduate student can administer a questionnaire instead of the professor [24].