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The questionnaire is one of the most frequently used methods for collecting quantifiable data in a survey. It usually takes the form of a list of several questions that can be closed or open-ended.

For usable results, the questionnaire must be offered to a large number of people. The answers to the questions can either refute or confirm hypotheses. A questionnaire worthy of the name must meet several criteria.

It must :
– ask simple and concise questions. Convoluted and long sentences are to be avoided,
– be neither too long nor too short. A questionnaire that is too long can discourage the respondents. The survey should take about 15 to 20 minutes. On the other hand, a questionnaire that is too short can give the image of a lack of seriousness.

To see how effective it is, it may be advisable to test the questionnaire beforehand with your acquaintances and friends.