The potential for introducing interviewer bias is a negative side of which data collection method? Observational studies Personally administered questionnaires Electronic questionnaires Face to-face interviews Hosni is a second-year PhD candidate in Higher Education Management om His research interest is work stress and coping mechanisms in Lebanese universities. He recently submitted the first draft for his superviso who suggested that some information obtained in Hosni's interviews are biased. Following is one of the interview questions and its answer where the supervisor thinks there is a bias: "imagine there is too much bureaucracy at your university don't you think it is hard to report stressful work incidents effectively here? Answer"Nol Teachers' voices are heard in my university. We are very well looked after and we have a smooth reporting mechanism. Based on the case above what is the main source of bias? The Supervisor The Interviewer The Situation The Interview is research in which the researcher must extract meaning from unstructured responses such as text from a recorded interview or a collage representing the meaning of some experience Respondent independent research Researcher dependent research Respondent-dependent research Researcher dependent research Hosni is preparing a questionnaire that he will distribute personally to the international students that live in the same dorm as him. He wants to include a question which specifies the nationality of the person. What type of scule should he use? Nominal Scale Ratio Scale interval Scale Ordinal Scale