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dc.contributor.authorBarratt, Monica
dc.contributor.authorFerris, J.
dc.contributor.authorLenton, Simon
dc.date.accessioned2017-01-30T13:11:45Z
dc.date.available2017-01-30T13:11:45Z
dc.date.created2014-09-04T20:00:21Z
dc.date.issued2014
dc.identifier.citationBarratt, M. and Ferris, J. and Lenton, S. 2014. Hidden Populations, Online Purposive Sampling, and External Validity: Taking off the Blindfold. Field Methods. 27 (1): pp. 3-21.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/29282
dc.identifier.doi10.1177/1525822X14526838
dc.description.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.

dc.publisherSage Publications
dc.subjecthard-to-reach
dc.subjecthidden populations
dc.subjectsampling
dc.subjectrepresentativeness
dc.subjectInternet
dc.titleHidden Populations, Online Purposive Sampling, and External Validity: Taking off the Blindfold
dc.typeJournal Article
dcterms.source.startPage1
dcterms.source.endPage19
dcterms.source.issn1552-3969
dcterms.source.titleField Methods
curtin.departmentNational Drug Research Institute (Research Institute)
curtin.accessStatusOpen access


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