Understanding Society Wave 14 boost trial: experiments with methods of recruiting a probability online boost sample
The role of the interviewer in producing mode effects: results from a mixed modes experiment comparing face-to-face, telephone and web administration
Extended field efforts to reduce the risk of non-response bias: have the effects changed over time? Can weighting achieve the same effects?
Effects of visual and aural communication of categorical response options on answers to survey questions
Is it a good idea to optimise question format for mode of data collection? Results from a mixed modes experiment