If you were a marketing research manager, would you permit the following if they were important to the usefulness of a study?
a. Telling the respondent the interview would take only two or three minutes when it usually took four minutes and a follow-up 10-minute interview was employed.
b. Telling the respondent the questionnaire would be anonymous but coding it so that the respondent could be identified (so that additional available information about the respondent's neighborhood could be used).
c. Secretly recording (or videotaping) a focus-group interview.