Questionnaires and web trials allow researchers to reach a far wider viewers than traditional paper questionnaires, internet-based.org telephone or face-to-face interviews and can be conducted by a fraction of the cost. This makes them a well known tool just for market research and customer studies as well as psychological research. However , despite their various advantages offered with some disadvantages which can weaken the validity of the results.
One major issue is that there is much less control over data capture than with a paper questionnaire. With a World wide web experiment the participant is able to view stimuli on their own personal device and could also modification settings including screen size, browser, internet connection and the standard font. This suggests that every respondent experiences a discreetly different questionnaire and this can impact how they answer questions.
Another problem is questionnaire taking tiredness which can bring about respondents abandoning the survey. The way to avoid this is to help make the questionnaire mainly because short as possible and only inquire abuout that are strongly related your research. You may also try to randomize the purchase of the questions and pretest the questionnaire prior to performing that to ensure that all the questions are apparent and understandable.
Finally, it is essential to keep in mind that Internet experiments depend on voluntary participation so they can be more susceptible to motivational confounding than laboratory experiments. To counter this, you can use an online marketplace such as SONA systems (often intended for undergraduate testing at universities), MTurk or Prolific to recruit participants.