Lunchtime Seminar: Tim Johnson on Sampling Hard-to-Find Populations

Monday 23 March 2015
1:00pm - 2:00pm
Conference Room, Urban Big Data Centre, 7 Lilybank Gardens, University of Glasgow, Glasgow G12 8RZ

Applied social research often requires a focus on populations that are "hard-to-find".

These might include social groups such as persons with exceptionally low literacy levels, persons with specific types of disabling conditions, some very rare ethnic minority groups, homeless and/or transient persons, illicit drug users, sexual minorities, migrants, and political extremists. These groups are difficult to sample and often also difficult to identify, to contact, and also sometimes to persuade to participate in traditional survey research studies. This presentation will provide an overview of the practical challenges associated with sampling and conducting surveys with hard-to-find populations and also review the various probability and non-probability based sampling methods currently used for this purpose.


Timothy Johnson is Director of the Survey Research Laboratory and Professor of Public Administration at the University of Illinois at Chicago. He has more than 30 years experience in the conduct of social and health-related survey research, and has served in elected positions in the American Association for Public Opinion Research, the World Association for Public Administration Research, and the Association of Academic Survey Research Organizations.