Figure 2.

Our 4-stage experimentation methodology (V_i=vignette i, assuming n vignettes and 1≤i≤n; D_j=doctor j, assuming 7 doctors and 1≤j≤7; MD_k=medical doctor k, assuming 3 doctors and 1≤k≤3; R_i=result of vignette V_i as generated by a checker or a medical doctor [MD]). In the “vignette creation” stage, the vignettes are compiled from reputable medical sources by an internal team of MDs. In the “vignette standardization” stage, the vignettes are reviewed and approved by a panel of experienced and independent physicians. In the “vignette testing on symptom checkers” stage, the vignettes are tested on symptom checkers by a different panel of experienced and independent physicians. In the “vignette testing on doctors” stage, the vignettes are tested on a yet different panel of experienced and independent physicians.