Hidden populations, online purposive sampling, and external validity: taking off the blind-fold

Barratt, Monica J., Ferris, Jason A. and Lenton, Simon (2015) Hidden populations, online purposive sampling, and external validity: taking off the blind-fold. Field Methods, 27 1: 3-21. doi:10.1177/1525822X14526838


Author Barratt, Monica J.
Ferris, Jason A.
Lenton, Simon
Title Hidden populations, online purposive sampling, and external validity: taking off the blind-fold
Journal name Field Methods   Check publisher's open access policy
ISSN 1525-822X
1552-3969
Publication date 2015-02-01
Year available 2014
Sub-type Article (original research)
DOI 10.1177/1525822X14526838
Volume 27
Issue 1
Start page 3
End page 21
Total pages 19
Place of publication Thousand Oaks, CA, United States
Publisher Sage Publications
Collection year 2015
Language eng
Abstract Online purposive samples have unknown biases and may not strictly be used to make inferences about wider populations, yet such inferences continue to occur. We compared the demographic and drug use characteristics of Australian ecstasy users from a probability (National Drug Strategy Household Survey, n = 726) and purposive sample (online survey conducted as part of a mixed-methods study of online drug discussion, n = 753) using nonparametric (bootstrap) and meta-analysis techniques. We found significant differences in demographics and drug use prevalence. Ideally, online purposive samples of hidden populations should be interpreted in conjunction with probability samples and ethnographic fieldwork.
Keyword Hidden populations
Hard-to-reach
Representatives
Sampling
Internet
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online before print: 14 April 2014.

Document type: Journal Article
Sub-type: Article (original research)
Collections: Institute for Social Science Research - Publications
Official 2015 Collection
 
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Citation counts: TR Web of Science Citation Count  Cited 4 times in Thomson Reuters Web of Science Article | Citations
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Created: Fri, 13 Feb 2015, 19:52:17 EST by Jason Ferris on behalf of Institute for Social Science Research