As a general rule, there should be an inverse relationship in a questionnaire between the number of open-ended questions utilized and the total number of questions featured in the questionnaire.
Questionnaire format: The different formats available to a researcher often come with expectations about time required on the part of respondents. Focus groups or interviews, for example, often take at least 30 minutes to complete. Questionnaires administered over the telephone, however, usually take considerably less time. Questionnaires administered online are less predictable. While shorter is often better, the ability of the respondent to complete the questionnaire at their convenience allows for greater flexibility.
The length of paper mailings is often dictated more by the increased cost of postage associated with heavier mailings than a concern over the time it will take respondents to complete the questionnaire. Neuman, W. Sign up Log in. Survey Science How much time are respondents willing to spend on your survey? Brent Chudoba 3 min read.
How long will your survey take? Just preview your survey to see what it is. Find out. What we analyzed:. What we learned:. What this means for you:. You might also like. SurveyMonkey Partner Listening to your customers around the globe—and overcoming challenges. Guest Post 5 min read. Antoine Andrews 3 min read.
Common rules of thumb. In general, questionnaire length average LOI should be limited to: 10 to 15 minutes for self-administered online surveys 20 to 30 minutes for semi-structured telephone interviews 30 to 60 minutes for in-depth, structured telephone or face-to-face interviews. The benefits of pretests.
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