Limitations of Questionnaires and Web Experiments

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Web-based experiments and questionnaires are essential epidemiologic tools that provide crucial information about public health and diseases. They are the most commonly used methods of gathering data, and are often less costly and time-consuming than face-toface interviews, mail-in questionnaires, or automated phone menu systems. Questionnaires and Web tests are not without their limitations, which should be addressed to achieve reliable and valid results.

A questionnaire may be affected by response bias. This is the tendency for respondents to answer questions based on their opinions and not on research goals. The layout of a survey can influence responses in many ways. For example the language of the question could affect whether respondents understand the question internet-based.org/ and interpret it in the same manner (reliable) or whether the question measures the topic you are looking for (valid), and the ability of respondents to accurately answer (credible).

Survey fatigue or a lack involvement with the questions may also cause respondents to be less inclined to give honest answers. Additionally, a lack of incentives or monetary compensation could make it difficult for respondents to take the time to complete a questionnaire.

Online questionnaires also pose a challenge for some experimental designs for example, positioning or reaction time studies. The variability in browser settings screens, sizes, and operating systems makes it difficult to measure and control the same variables for different people.

Finally, Web-based surveys are only available to those who are keyboard and Internet literate, which currently excludes a significant percentage of the population. In addition, it’s often difficult to Web researchers to debrief participants after an experiment’s window closes.

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