A questionnaire is a set of questions on a given topic that can be filled in by an interviewer [interviewer: the person conducting the survey ] or by the person being asked the questions. A questionnaire is best used to collect information that is not available elsewhere as a secondary resource.
Before writing your questionnaire, make sure you know what you want to find out.
Come up with a hypothesis - a prediction of what you think the survey will show. After completing the survey, look at the results to see if they agree with your original hypothesis [hypothesis: an assumption one might make which can be tested by further investigation ].
Here are some examples of a questionnaire hypothesis:
You also need to know how the survey results will help you. There's no point in collecting vast amounts of information if it's not relevant to your aim.
The best use of a questionnaire is to collect information that is not available elsewhere as a secondary resource. This could be: