![]() ![]() ![]() Limited access: given that to correctly participate in this survey requires a computer, telephone or Smartphone with internet connection, the survey may only access a determined socio-demographic user profile. In this sense the collected data will probably be of a lower quality than the data coming from a survey using interviewers. As there is no interviewer, the respondent can avoid certain questions, misunderstand them or superficially read the instructions for filling out the form. Lack of interviewer: this is one of the main disadvantages of this kind of survey. Public transport users: if a sufficiently large number of public transport user email addresses are available, then the survey can quickly reach the correct sample size. ![]() Ĭost/benefit: given that the entire process is more automatic and does not require the training of any interviewers, it is a much cheaper type of survey to conduct than intercept, telephone, and postal surveys.Speed: the information is directly collected digitally and the raw data is very quickly available for processing. Visual supports: web based surveys allow the use of visual and audible aids which can help the respondent give reliable answers. Given the widespread and increasing availability of smartphones, the public can also answer the questions at any location and at any time of day. Convenience: the respondent can fill in the questionnaire at their convenience. ![]()
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