What is the difference between a password-protected web-survey and an open web-survey?
In general, a password protected web-survey is designed to limit access to only those individuals specifically invited to take a web-survey whereas a general/open survey is available to interested individual to take. One of the more effective and straightforward ways of implementing a password-protected web-survey is the use of a screening page for the survey where respondents enter some type a pre-assigned number or survey access code. The entered access code is then matched to an established participant list to ensure that the code is valid. If the access code is valid and has not been submitted previously, the respondent is admitted to the survey. In conjunction with cookies and other technologies, these methods can allow respondents to start a survey from the beginning or pick-up where he/she left off.
