Limitations of Questionnaires and Web Experiments

Web experiments and questionnaires are essential methods of epidemiology that offer vital information about public health and disease. They are a common means of collecting data, which is often less costly click to read and time-consuming than face-toface interviews, mailed questionnaires, or automated telephone menu systems. However questionnaires and Web tests have some limitations that need to be addressed in order to ensure reliable and valid results.

A questionnaire can be affected by response bias. This is the tendency for respondents to answer questions based on their opinions and not on research goals. The design of a questionnaire may influence responses in many ways. For example, the wording of the question could influence whether the respondents comprehend the question and interpret it in the same manner (reliable) or whether the question measures what you’re interested in (valid), and whether they are able to accurately answer (credible).

Respondents may also experience fatigue or lack of interest in the questions that are asked, which reduces the likelihood of them providing honest answers. In addition, the absence of incentive or compensation may discourage respondents from taking the time to complete survey forms.

Online questionnaires also pose a challenge for some experiments, like positioning or reaction-time studies. It is challenging to control and measure variables across participants because of the differences in settings for browsers operating systems, settings, and sizes of screens.

Finally, web-based surveys may only be accessed by people who have keyboards and Internet literate. This excludes a significant part of the population. In addition, it’s often difficult to Web researchers to provide feedback to participants after the experiment’s time-out.