A questionnaire is a tool for research that includes questions in a standard format to capture the responses of the respondents. Responses to specific questions (items) on a structured questionnaire may be combined into a composite scale or index to allow statistical analysis. Many kinds of research employ questionnaires, including academic research and market research.
When you design your survey, it is essential to keep in mind the target audience. The questions should be simple and understandable, without using jargon or technical terms which are difficult for novices. It is also essential to keep the duration of the survey brief. The longer the survey the more unlikely respondents are to respond.
Web experiments are an online experimental research method that uses an interface that is based on a browser, such as an app for mobile or a website. The advantages of this approach include the ability to create customized and interactive experiments, the capability to track user behavior, and the capability to use conditional branching in response to previous answers given by the participant.
The disadvantages of web-based research include the lack of a control group, which could result in unintentional confounding and poor generalization. Due to the nature of interaction of web-based experiments, it can also be difficult to evaluate the results.
It is also essential to test the questionnaire, if only using a convenience sample, prior to handing it out on the field. This will allow you to identify any ambiguity or unclear words in the questions and eliminate them prior to administering the survey to your desired audience.