On the relative threats from sampling and non-sampling errors in print audience
Symposium: 1997: Vancouver, Session 5 - Technical Issues
Authors: Englert, Sherry, Pinnell, Jon
Organisations: MarketVision Research, Ohio, USA
Topics: Reliability, Sampling
How computerized interviewing eliminates the screen-in bias of follow-up questions
Symposium: 1995: Berlin
Authors: Appel, Valentine, Pinnell, Jon
Organisations: Consultant, IntelliQuest
Topics: Data Collection, Questionnaire Design