A professional who supervises and coordinates activities of workers engaged in interviewing people to compile statistical information about topics, such as public issues or consumer buying habits. Responsibilities include:

• Recruits and hires interviewers.
• Trains interviewers in method of approaching public, asking questions, and recording answers.
• Supplies interviewers with names or addresses of persons to contact or instructs them in sampling methods used in compiling contact lists.
• Reviews questionnaires for completeness and accuracy.
• Verifies work of interviewers by telephoning persons interviewed to review answers and evaluate personal manner of interviewers.
• Tallies number of calls made and questionnaires completed by interviewers.
• Reviews, classifies, and sorts questionnaires, following specified procedures and criteria.