A questionnaire is an instrument for research that has questions that are in a standard format to capture the responses of the respondents. The responses to each question (item) on a structured survey can be consolidated and examined statistically. Many types of research use questionnaires, including academic research and market research.

When you design your survey, it is important to keep in mind the target audience. The questions should be clear and simple to comprehend and without words that are difficult to comprehend for those who are not experts. The length of the survey should be kept to a minimum. The longer the survey is, the less likely respondents will respond.

Web experiments are an online research method that employs web-based interfaces, such as an application for mobile devices or a website. The advantages of this approach include the ability to create personal and interactive experiments, the capability to track user activity, and the possibility of using conditional branching in response to previous answers provided by the participant.

The disadvantages of web-based experiments include the absence of a control group which could lead to accidental confusion and poor generalization. Because of the interactive nature of web experiments, it can also be difficult to analyse their results.

In the end, it is crucial to pretest your questionnaire, at least using a convenience sample before administering it in the field. This will allow you to spot any ambiguity or unclear words in the questions and eliminate them prior to distributing the survey to your intended audience.

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