Time-Space Sampling and Respondent-Driven Sampling with Hard-To-Reach Populations.

The article discusses the application of time-space sampling (TSS) and respondent-driven sampling (RDS) on hard-to-reach people. TSS is used for tallying respondents at particular places and times while RDS involves social networks of respondents for expanded data gathering. Both data collection through TSS and RDS in human immuno virus-associated projects have proven that both techniques are effective in gathering information when applied with actions including correct planning, observation, and evaluation of the sampling strategy.