“…Some studies find that selfadministered instruments, either of the paper and pencil variety or computer assisted, reduce measurement error and tend to produce reports of higher frequencies of sensitive sexual and drug using behaviors than do face-to-face interview methods (Boekeloo et al, 1994;Des Jarlais et al, 1999;Le, Blum, Magnani, Hewett, & Do, 2006;Romer et al, 1997;Simoes, Bastos, Moreira, Lynch, & Metzger, 2006a;Turner et al, 1998). It is thought that higher frequencies of sexual behaviors, particularly stigmatized behaviors, reflect greater validity since adults may seek to manage their public image by underreporting such behaviors (Catania et al, 1990).…”