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A questionnaire is a research instrument that includes questions in a standard format to gather responses from respondents. The responses to each question (item) in a structured survey can be aggregated and analyzed statistically. A variety of research types use questionnaires, such as market research and academic studies.
When designing your survey it is crucial to consider the audience you are targeting. Questions should be clear and simple to comprehend without the use of jargon that is difficult for non-experts to understand. It is also important to keep the length of the survey to a minimum. Respondents dislike long surveys, and the longer a survey, the lower the response rate will be.
Web experiments are a method of conducting online research by using a browser-based interface such as a site or mobile app. This approach has many advantages, including the capability of creating interactive and personalised tests, the capability of tracking user activity, and conditional branching depending on the previous answers provided by participants.
Web experiments cannot be controlled, and this can result in confusion or poor generalization. Due to the interactivity of web experiments, it could be difficult to analyze the results.
It is also important to pretest your questionnaire, at a minimum, using a convenient sample, before administering it in the field. This will help you identify any ambiguity or unclear words in the questions and eliminate them prior the survey to your desired audience.