Confusion! In the psychology practice paperWatch
The psychologist was interested in finding out whether dream themes differed between males and females, particularly in terms of social interaction. She decided to conduct a pilot study. Twenty undergraduate students (8 males and 12 females) volunteered for the study. For a six week period the students were interviewed at 9 am each morning when they arrived at university. Interviewers, who did not know the purpose of the study, carried out and recorded the dream interviews.
Question: What are investigator effects? Suggest one way in which they could have been minimised during the dream interviews.
I looked in my book to see what could minimised investigator effects and it said double or single blind studies. However, I thought because the interviewer doesn't know, that counts as a double blind study.
Another method is to try to minimise the differences between the participants. Recording questions means that the tone of voice is the same for everyone. Remember, investigator effects can be anything the investigator does. The kind of sample chosen, their tone of voice, their physical actions etc. Try to think outside of the textbook, research methods tends to be quite generous with the possible answers you can give.