How web surveys differ from other kinds of user interfaces
Schober, Michael F.; Conrad, Frederick G.; Ehlen, Patrick; Fricker, Scott S. (2003). Proceedings of the American Statistical Association, Section on Survey Research Methods [LINK]
Schober, Michael F.; Conrad, Frederick G.; Ehlen, Patrick; Fricker, Scott S. (2003). Proceedings of the American Statistical Association, Section on Survey Research Methods [LINK]