Which primary data collection technique minimizes both interviewer and question bias?

Question

Quizplus · Accepted Answer

Observation minimizes both interviewer and question bias because it involves directly watching subjects' behavior in a natural or controlled setting without the need for questions or interaction from the researcher, thus reducing the influence of the researcher's presence or the phrasing of questions on the subjects' responses.

Which Primary Data Collection Technique Minimizes Both Interviewer and Question