Questionnaires and web tests allow doctors to reach a much wider viewers than traditional paper questionnaires, click to read cellphone or face-to-face interviews and is conducted at a fraction of the cost. This makes them a common tool to get market research and customer surveys online as well as factors studies. However , in spite of their many advantages offered with some negatives which can undermine the quality of the results.
One major issue is that right now there is much less control over capture data than with a paper questionnaire. With a Internet experiment the participant is able to view stimuli on their own personal device and might also improve settings such as screen size, browser, internet connection and even the arrears font. Meaning that each respondent experience a quietly different questionnaire and this may affect how they get suggestions.
Another problem is customer survey taking exhaustion which can bring about respondents leaving the study. The way to steer clear of this is to help make the questionnaire as short as is feasible and only inquire abuout that are highly relevant to your research. Also you can try to randomize the purchase of the questions and pretest the questionnaire just before performing this to ensure that all the questions are very clear and understandable.
Finally, you will need to keep in mind that Net experiments derive from voluntary participation so they can be susceptible to motivational confounding than laboratory trials. To counter this kind of, you can use a web marketplace including SONA devices (often employed for undergraduate assessment at universities), MTurk or Productive to recruit participants.