Evaluations of population preferences for testing have typically focused on the acceptability of specific venue-based testing options, such as home-based, provider-initiated, or workplace testing, usually without consideration or offer of other options. Results from these assessments do not probe the potential diversity in testing preferences of target populations; they do not ascertain how individuals value diverse characteristics of testing options; nor can they identify combinations of testing options that could maximize uptake of testing. The investigators posit that systematically designed HIV testing interventions, matched specifically to the heterogeneous preferences of diverse target populations, hold potential to greatly improve uptake of testing.