Mail Surveys
In this research method, questionnaires are sent by mail to respondents. They are ideal for studies where simple close-ended questions will provide the information needed. If there are many open-ended questions that need probing, a telephone survey may be a better option.

Mail surveys are typically chosen when the client feels it is necessary to provide all potential respondents with the opportunity to participate in the research. Although it is not necessary to survey the entire population in order to get significant results, the fact that each member of the population was provided an opportunity to share their opinion is very important in some situations.

Like telephone and online surveys, mail surveys require detailed attention to questionnaire design. Wording and question order have a huge influence on the results. We are careful to remove bias and consider subtle wording nuances throughout the questionnaire. Specific to mail surveys, layout and white space are also taken into consideration. Respondents are more likely to successfully complete all questions in the desired format if a consistent survey layout and design are followed.

Reminder postcards or a second mailing of the survey are recommended to increase response rate. Additionally, a minimal monetary gift ($1 - $5) could be used as an incentive. If conducting an employee or customer satisfaction survey, consider sending a letter explaining that an independent market research company has been hired to gather feedback and that responses will remain anonymous and confidential.

Other Related Topics:
Additional information on mail surveys
Strengths and weaknesses of mail surveys