Historique
Périodique
Tracing selection effects in three non-probability samples
(Effets de biais de sélection dans trois échantillons de non-probabilité)
Auteur(s) :
BARENDREGT, C. ;
VAN DER POEL, A. ;
VAN DE MHEEN, D.
Année
2005
Page(s) :
124-131
Langue(s) :
Anglais
Refs biblio. :
20
Domaine :
Drogues illicites / Illicit drugs
Discipline :
EPI (Epidémiologie / Epidemiology)
Note générale :
European Addiction Research, 2005, 11, (3), 124-131
Note de contenu :
tabl.
Résumé :
ENGLISH :
Snowball sampling and targeted sampling are widely applied techniques to recruit samples from hidden populations, such as problematic drug users. The disadvantage is that they yield non-probability samples which cannot be generalised to the population. Despite thorough preparatory mapping procedures, selection effects continue to occur. This paper proposes an interpretation frame that allows estimating the direction of selection bias after data collection. Critical examination of the recruitment procedure and comparison with statistical and non-statistical external data sources are the core features of the interpretation frame. Applying the interpretation frame increases insight into the reliability of the results and allows to estimate where selection bias may have occurred. (Author's abstract.)
Affiliation :
Addiction Research Institute Rotterdam (IVO), Erasmus University Rotterdam, PO Box 1738, 3000 DR Rotterdam ; barendregt@ivo.nl
Pays-Bas. Netherlands.
Pays-Bas. Netherlands.