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One of the challenges in studying HIV-risk behaviors among gay men is gathering information from a non-biased sample, as traditional probability sampling methods cannot be applied in gay populations. Respondent-Driven Sampling (RDS) has been proposed as a reliable and bias-free method to recruit “hidden” populations, such as gay men. The aim of this study is to assess the feasibility and effectiveness...
The reciprocity index can also be calculated using not the original recruitment matrix, but the demographically adjusted recruitment matrix (Heckathorn, 2002). This corrects for differences in cross-count recruitments that are due, not to non-random recruitment from personal networks, but from differential recruitment, such as HIV-positive recruiting more than HIV-negatives. However, because demographic...
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