Describe the advantages and disadvantages inherent in telephone interviewing

What will be an ideal response?

Advantages: Telephone interviewing reduces the staff required to execute a research project, and is very economical. It is easy to monitor telephone interviewers to ensure quality and eliminate interviewer bias. Telephone interviews can easily be recorded and transcribed. They also afford instant anonymity, which can be good for accessing hard-to-reach populations and sensitive topics. Disadvantages: Telephone interviews exclude all people who do not have a telephone, or have an unlisted number. Additionally, it is easy for people to screen calls to avoid researchers using caller ID or an answering machine. Finally, it eliminates the ability of the interviewer to assess response using visual cues.