The Research and Development Survey (RANDS) is a series of cross-sectional surveys from probability-sampled commercial survey panels which began in 2015. RANDS 3 was administered by the National Opinion Research Center (NORC) using the Amerispeak Panel in the spring of 2019 and contains existing questions from the National Health Interview Survey (NHIS) as well as embedded probe questions and split-panel experiments for cognitive evaluations.