4,320
Participants
Start Date
September 30, 2014
Primary Completion Date
October 31, 2014
Study Completion Date
October 31, 2014
Priming effect from vignette
In the arm of DCV, the self-assessed vision (PSAV) is listed after the vignette questions; however, in the arm of ICV, the self-assessment of vision (SAV) is listed before the vignette questions. Priming effect from vignette will be estimated by comparing those two randomized variables (i.e., SAV and PSAV).
Jingning County, Lishui
Jingning County in Zhejiang Province in China
UNKNOWN
Harvard School of Public Health (HSPH)
OTHER