Questionnaires and web trials allow experts to reach a far wider customers than classic paper questionnaires, internet-based.org/internet-polls/ mobile phone or face-to-face interviews and can be conducted in a fraction of the cost. This will make them a common tool for market research and customer research as well as unconscious research. However , despite their many advantages offered with some disadvantages which can undermine the quality of the results.
One serious problem is that there is much less control over capture data than with a paper set of questions. With a Internet experiment the participant has the capacity to view stimuli on their own personal device and may also also switch settings just like screen size, web browser, internet connection as well as the standard font. Therefore that each respondent experiences a discreetly different questionnaire and this could affect how they answer questions.
Another problem is questionnaire taking exhaustion which can result in respondents leaving the study. The way to avoid this is to make the questionnaire mainly because short as is possible and only ask questions that are tightly related to your research. Also you can try to randomize the buy of the questions and pretest the questionnaire just before performing that to ensure that the questions are obvious and understandable.
Finally, you will need to keep in mind that Internet experiments are based on voluntary engagement so they can be susceptible to motivational confounding than laboratory trials. To counter this, you can use an internet marketplace including SONA systems (often intended for undergraduate tests at universities), MTurk or Legendary to generate participants.