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ERIC Number: EJ1136544
Record Type: Journal
Publication Date: 2015-Feb
Pages: 19
Abstractor: As Provided
ISSN: ISSN-1525-822X
Hidden Populations, Online Purposive Sampling, and External Validity: Taking off the Blindfold
Barratt, Monica J.; Ferris, Jason A.; Lenton, Simon
Field Methods, v27 n1 p3-21 Feb 2015
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.
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Publication Type: Journal Articles; Reports - Research; Tests/Questionnaires
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers - Location: Australia
Grant or Contract Numbers: N/A