Hits 1-3 within 3 documents
Nonresponse in the recruitment of an internet panel based on probability sampling [journal article]
Source: Survey Research Methods, 3 (2009) 2. p.59-72
Impact of mixed survey modes on physical activity and fruit/ vegetable consumption: a longitudinal study [journal article]
Source: Survey Research Methods, 3 (2009) 2. p.81-90
The mobile-only population in Portugal and its impact in a dual frame telephone survey [journal article]
Source: Survey Research Methods, 3 (2009) 2. p.105-111