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From networks to populations: the development and application of respondent-driven sampling among IDUs and Latino gay

Jesus Ramirez-Valles1, Douglas D Heckathorn, Raquel Vázquez

  • 1Community Health Sciences, University of Illinois-Chicago, School of Public Health, Chicago, IL 60612-4394, USA. valles@uic.edu

AIDS and Behavior
|October 20, 2005
PubMed

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Sometimes we want to see how people change over time, as in studies of human development and lifespan. When we test the same group of individuals repeatedly over an extended period of time, we are conducting longitudinal research. Longitudinal research is a research design in which data-gathering is administered repeatedly over an extended period of time. For example, we may survey a group of individuals about their dietary habits at age 20, retest them a decade later at age 30, and then again...
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